{"title":"Builder — Test kits","description":null,"products":[{"product_id":"seachem-ammonia-alert-1-year","title":"Seachem Ammonia Alert (1 Year)","description":"\u003cp\u003e\u003cstrong\u003eToxic ammonia visible on the glass before a single fish shows stress.\u003c\/strong\u003e Seachem Ammonia Alert is a small in-tank sensor that monitors free ammonia continuously — no test kits, no reagents, no water samples, no procedure. The sensor disc changes colour reversibly from yellow through green to blue as free ammonia rises, and it detects concentrations below 0.05 mg\/L (ppm). One unit lasts over a year in freshwater or marine, and it is small enough to sit in a display tank without becoming part of the scenery.\u003c\/p\u003e\u003ch3\u003eHow to read it\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eColour\u003c\/th\u003e\n\u003cth\u003eFree ammonia\u003c\/th\u003e\n\u003cth\u003eAction\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eSafe\u003c\/strong\u003e (yellow)\u003c\/td\u003e\n\u003ctd\u003eBelow 0.02 mg\/L\u003c\/td\u003e\n\u003ctd\u003eNo action needed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlert\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbout 0.05 mg\/L\u003c\/td\u003e\n\u003ctd\u003eTolerated 3–5 days — monitor and plan a water change\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbout 0.2 mg\/L\u003c\/td\u003e\n\u003ctd\u003eTolerated 1–3 days — water change soon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cstrong\u003eToxic\u003c\/strong\u003e (blue)\u003c\/td\u003e\n\u003ctd\u003eAbout 0.5 mg\/L\u003c\/td\u003e\n\u003ctd\u003eImmediate water change, or dose \u003ca href=\"\/products\/seachem-amguard\"\u003eSeachem AmGuard\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eResponse to rising ammonia takes about 15 minutes. Coming back down is slower — roughly four hours from Toxic to Safe once the ammonia has actually gone.\u003c\/p\u003e\u003ch3\u003eWhat the colour means in test-kit terms\u003c\/h3\u003e\u003cp\u003eAt 0.02 mg\/L free ammonia — the top of the Safe band — the equivalent \u003cem\u003etotal\u003c\/em\u003e ammonia reading is roughly 0.25 mg\/L in marine water at pH 8.3, or 3.6 mg\/L in freshwater at pH 7.0.\u003c\/p\u003e\u003cp\u003eThose two numbers differ that much because pH decides how much of the total sits in the free, dangerous form. It is the single most useful thing to understand about ammonia in an aquarium.\u003c\/p\u003e\u003ch3\u003eWhy it may disagree with your test kit\u003c\/h3\u003e\u003cp\u003eLiquid test kits usually measure \u003cem\u003etotal\u003c\/em\u003e ammonia — both the free (NH3) and ionised (NH4+) forms. Ammonia Alert responds only to free ammonia, which is the form that actually harms fish.\u003c\/p\u003e\u003cp\u003eBelow pH 7.0 virtually all ammonia exists as harmless ammonium, so the sensor can correctly stay yellow while a total-ammonia kit shows a reading. It also will not react to ammonia already detoxified by a conditioner such as Prime or AmGuard, because bound ammonia is no longer dangerous. That is the sensor working, not failing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eContinuous free-ammonia sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eFree ammonia (NH3) only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDetection limit\u003c\/th\u003e\n\u003ctd\u003eBelow 0.05 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBands\u003c\/th\u003e\n\u003ctd\u003eSafe, Alert, Alarm, Toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResponse, rising\u003c\/th\u003e\n\u003ctd\u003eAbout 15 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResponse, falling\u003c\/th\u003e\n\u003ctd\u003eAbout 4 hours, Toxic to Safe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eService life\u003c\/th\u003e\n\u003ctd\u003eOver 1 year of continuous use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagents or samples\u003c\/th\u003e\n\u003ctd\u003eNone — reads in the tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNot recommended\u003c\/th\u003e\n\u003ctd\u003eAcidic pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eFitting and care\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eA dry sensor can look greenish out of the packet and may take a few days to equilibrate once submerged\u003c\/li\u003e\n\u003cli\u003eWipe algae off with a clean soft cloth only — never bleach, soap, detergent or anything abrasive\u003c\/li\u003e\n\u003cli\u003eDo not touch the sensor surface; skin oils clog it. Some dye-based medications may discolour it\u003c\/li\u003e\n\u003cli\u003eSensitivity improves with age as long as it is kept wet — store it in a little RO water between uses rather than dry\u003c\/li\u003e\n\u003cli\u003eRead it under natural or daylight-spectrum lighting; strongly blue or pink tank lighting will fight you\u003c\/li\u003e\n\u003cli\u003eQuick function check: hold the card over an open bottle of ammonia-based household cleaner and it should turn blue rapidly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater and marine display tanks · tanks part way through cycling · quarantine and hospital tanks · anyone who will not test daily but wants to know when something has gone wrong · a second opinion when a liquid kit reads high after dosing a conditioner.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e acidic tanks, where Seachem does not recommend it · measuring total ammonia, which it does not do · producing an exact figure when a number is what you need — \u003ca href=\"\/products\/seachem-multitest-ammonia-75-tests\"\u003eSeachem MultiTest: Ammonia\u003c\/a\u003e is that tool · substituting for cycling a new tank properly.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-amguard\"\u003eSeachem AmGuard\u003c\/a\u003e — the emergency response when the sensor reads Alarm or Toxic, with a dosing table written around these exact bands\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-ph-alert-6-month\"\u003eSeachem pH Alert\u003c\/a\u003e — the same idea for pH, and pH is what decides how much of your ammonia is in the dangerous form\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-alerts-combo-pack\"\u003eSeachem Alerts Combo Pack\u003c\/a\u003e — the ammonia and pH sensors together\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-multitest-ammonia-75-tests\"\u003eSeachem MultiTest: Ammonia\u003c\/a\u003e — for when you need a figure rather than a band\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-prime\"\u003eSeachem Prime\u003c\/a\u003e — the routine conditioner that detoxifies ammonia at water changes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-stability\"\u003eSeachem Stability\u003c\/a\u003e — builds the biofilter that stops the sensor changing colour at all\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/seachem\"\u003eThe full Seachem range\u003c\/a\u003e — water care, media and test kits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eRated by Seachem for over a year of continuous use; there is no separate warranty term published for a consumable sensor. Your rights under the Australian Consumer Law apply regardless and cannot be excluded. Ships as a standard parcel.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow long does Seachem Ammonia Alert last?\u003c\/h4\u003e\u003cp\u003eOver a year of continuous use in the tank. Sensitivity actually improves with age provided the sensor stays wet, so store it in a little RO water rather than dry if it ever comes out.\u003c\/p\u003e\u003ch4\u003eWhy is my Ammonia Alert yellow when my test kit shows ammonia?\u003c\/h4\u003e\u003cp\u003eLiquid kits usually measure total ammonia — free NH3 plus ionised NH4+. Ammonia Alert responds only to free ammonia, the form that harms fish. Below pH 7.0 almost all ammonia is the harmless ionised form, so both readings can be correct at the same time.\u003c\/p\u003e\u003ch4\u003eDoes it still work after dosing Prime or AmGuard?\u003c\/h4\u003e\u003cp\u003eYes, and this is where it earns its place. It will not react to ammonia that has already been bound and made non-toxic, so it shows the state the fish are actually in rather than the false positive a liquid kit gives.\u003c\/p\u003e\u003ch4\u003eCan I use it in a saltwater tank?\u003c\/h4\u003e\u003cp\u003eYes, in marine and freshwater both. The equivalent total-ammonia figure differs between the two because marine tanks run at a higher pH.\u003c\/p\u003e\u003ch4\u003eHow do I check the sensor still works?\u003c\/h4\u003e\u003cp\u003eHold the card over the open bottle of an ammonia-based household cleaner. It should turn blue quickly, then return to its previous colour once it is back in the tank.\u003c\/p\u003e\u003ch4\u003eCan I clean algae off it?\u003c\/h4\u003e\u003cp\u003eWipe it with a clean soft cloth only. No bleach, no soap, no detergent, nothing abrasive, and keep bare fingers off the sensor pad — skin oils clog it permanently.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":54773851423011,"sku":"725032-10","price":28.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-ammonia-alert-1-year-280803.webp?v=1790230840"},{"product_id":"seachem-multitest-ammonia-75-tests","title":"Seachem MultiTest: Ammonia 75 Tests","description":"\u003cp\u003e\u003cstrong\u003eThe only ammonia test that still reads correctly while you're dosing Prime.\u003c\/strong\u003e Seachem MultiTest Ammonia measures both total ammonia (NH3 + NH4+) and toxic free ammonia (NH3) down to less than 0.05 mg\/L, in freshwater and marine aquariums. It uses Seachem's gas-exchange sensor technology — the same sensor used in Seachem Ammonia Alert — so unlike salicylate or Nessler-based kits, it isn't fooled by ammonia-binding conditioners such as Prime, Safe or AmGuard, which can break down and give false readings in conventional tests at high pH.\u003c\/p\u003e\n\u003ch3\u003eWhy free ammonia matters\u003c\/h3\u003e\n\u003cp\u003eFree ammonia (NH3) is the form that harms fish gills; ionised ammonium (NH4+) is essentially non-toxic at normal pH. Most test kits only report total ammonia and can't tell the two apart. This kit separates them, so a reading tells you whether you're looking at a real emergency or a chemically-bound reading that isn't actually dangerous.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver 75 tests per kit\u003c\/strong\u003e — works out to about 82c per test at full retail price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads both total and free ammonia\u003c\/strong\u003e to below 0.05 mg\/L, with minimal interference from common conditioners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-cavity opaque white test plate\u003c\/strong\u003e — run and compare up to six samples side by side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSliding colour chart with a 5 cm viewing window\u003c\/strong\u003e for a clearer colour match than a printed card held up to the light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference sample included\u003c\/strong\u003e — check the kit itself is reading correctly whenever you doubt a result.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and marine\u003c\/strong\u003e — one kit works across the whole store's tank types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003e75+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eTotal ammonia (NH3 + NH4+) and free ammonia (NH3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDetection limit\u003c\/th\u003e\n\u003ctd\u003eLess than 0.05 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCost per test\u003c\/th\u003e\n\u003ctd\u003e82c per test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU \/ Barcode\u003c\/th\u003e\n\u003ctd\u003e725140-950 \/ 000116095006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTotal Ammonia Reagent 1\u003c\/li\u003e\n\u003cli\u003eSensor container (6 sensors)\u003c\/li\u003e\n\u003cli\u003eTotal ammonia reference sample\u003c\/li\u003e\n\u003cli\u003eForceps and sample pipette\u003c\/li\u003e\n\u003cli\u003eAmmonia colour chart\u003c\/li\u003e\n\u003cli\u003eMulti-cavity test plate and instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDirections\u003c\/h3\u003e\n\u003cp\u003eAdd a sensor to a sample well, dose with Total Ammonia Reagent 1, and read total ammonia against the sliding colour chart. Free ammonia is read from the same sensor technology used in Seachem's dedicated Ammonia Alert monitor. Run the included reference sample alongside your tank sample any time a result looks unexpected, to confirm the kit itself is reading correctly.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater and marine tanks, including tanks currently dosed with Prime, Safe, AmGuard or similar ammonia-binding conditioners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e pinpointing ammonia source or location — a positive reading tells you a problem exists, not whether it's from overfeeding, an under-cycled filter or a bioload increase. Pair it with regular nitrite and nitrate testing for the full picture.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep away from children. The reagent contains a strong alkali and the sensor storage gel a strong acid — rinse any skin or eye contact thoroughly with water and seek medical advice if irritation persists.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-ammonia-alert-1-year\"\u003eSeachem Ammonia Alert\u003c\/a\u003e — the same sensor technology as an always-on in-tank monitor, for continuous ammonia awareness between test kit readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-multitest-phosphate-75-tests\"\u003eSeachem MultiTest Phosphate\u003c\/a\u003e and a nitrite\/nitrate kit — for the full water-quality picture rather than ammonia in isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-prime-bonus-rhino-30-bonus-325-ml\"\u003eSeachem Prime\u003c\/a\u003e — detoxifies ammonia while you address the cause; this kit is one of the few that reads accurately while Prime is in the water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eShips as a standard parcel. Reagents are chemical products — store away from direct sunlight and extreme heat, and check use-by information on the pack. Covered by the consumer guarantees under Australian Consumer Law in addition to Seachem's own guarantee.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWill this kit give a false reading if I'm dosing Prime?\u003c\/h4\u003e\n\u003cp\u003eNo — that's the specific problem it's built to avoid. Seachem's gas-exchange sensor technology reads free ammonia accurately even when ammonia-binding conditioners like Prime, Safe or AmGuard are present, unlike older salicylate or Nessler-based kits.\u003c\/p\u003e\n\u003ch4\u003eWhat's the difference between total and free ammonia?\u003c\/h4\u003e\n\u003cp\u003eTotal ammonia is NH3 plus NH4+ combined. Free ammonia (NH3 alone) is the toxic form that actually harms fish — ammonium (NH4+) is essentially harmless at normal pH. This kit reports both, so you can tell a genuine emergency from a bound, low-risk reading.\u003c\/p\u003e\n\u003ch4\u003eHow many tests will 75 tests actually last?\u003c\/h4\u003e\n\u003cp\u003eAt roughly 82c per test, a kit covers 75+ individual readings — enough for weekly testing across a couple of tanks for the better part of a year, more if you're only testing one system.\u003c\/p\u003e\n\u003ch4\u003eDoes the kit work in a marine or reef tank?\u003c\/h4\u003e\n\u003cp\u003eYes — it's rated for both freshwater and marine use.\u003c\/p\u003e\n\u003ch4\u003eWhat does the reference sample do?\u003c\/h4\u003e\n\u003cp\u003eIt's a known-value sample you can test alongside your tank water to confirm the kit itself is reading correctly, which is useful whenever a result looks surprisingly high or low.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":54773855027491,"sku":"725140-950","price":61.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-multitest-ammonia-75-tests-755363.webp?v=1790230839"},{"product_id":"seachem-ph-alert-6-month","title":"Seachem pH Alert (6 Month)","description":"\u003cp\u003e\u003cstrong\u003eKnow your pH at a glance, every day — no strips, no drops.\u003c\/strong\u003e Seachem pH Alert is a continuous colour-changing sensor for freshwater aquariums. Placed anywhere visible in the tank or filter, its sensor shifts reversibly from yellow through orange to red as pH moves between 5.4 and 8.0 — just match the sensor colour against the included colour wheel to read your pH.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous monitoring\u003c\/strong\u003e — catches pH swings between water tests, rather than only the moment you happen to test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads pH from 5.4 to 8.0\u003c\/strong\u003e on a simple colour wheel — no reagents, no liquid tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast response\u003c\/strong\u003e — first reading available around 30 minutes after installation; after that, pH shifts register within roughly 10 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong service life\u003c\/strong\u003e — rated for around 6 months of continuous use, up to 4× longer than competing colour indicators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact\u003c\/strong\u003e — nearly half the size of competing monitors, so it stays unobtrusive in the display.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater use only\u003c\/strong\u003e — not formulated for marine or brackish water.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003ctd\u003epH Alert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003epH range read\u003c\/th\u003e\n\u003ctd\u003e5.4–8.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInitial response time\u003c\/th\u003e\n\u003ctd\u003eApproximately 30 minutes after installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSubsequent response time\u003c\/th\u003e\n\u003ctd\u003eApproximately 10 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated service life\u003c\/th\u003e\n\u003ctd\u003eAround 6 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReading method\u003c\/th\u003e\n\u003ctd\u003eColour wheel comparison, no reagents required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003e725035-20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e116002004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eCare\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWipe algae away with a clean, soft material only — no bleach, soap, detergents or hard objects\u003c\/li\u003e\n\u003cli\u003eSome dye-based medications may discolour the sensor\u003c\/li\u003e\n\u003cli\u003eRead under natural or daylight-spectrum lighting for best sensitivity\u003c\/li\u003e\n\u003cli\u003eReplace the unit when the sensor colour visibly fades or washes out — that's the end-of-life signal, generally around 6 months of continuous use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e freshwater community, planted and cichlid tanks where you want an at-a-glance pH check between full water tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e marine or brackish aquariums — the sensor and colour range are calibrated for freshwater pH only. Use a marine-specific test kit for saltwater systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by Seachem's standard quality guarantee at the time of sale, in addition to your rights under Australian Consumer Law. Ships as a standard parcel.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I use pH Alert in a saltwater tank?\u003c\/h4\u003e\u003cp\u003eNo. pH Alert is formulated for freshwater use only and isn't calibrated for marine pH ranges.\u003c\/p\u003e\u003ch4\u003eHow do I know when it needs replacing?\u003c\/h4\u003e\u003cp\u003eWhen the sensor colour visibly fades or washes out, it's exhausted and ready to be replaced — generally after around 6 months of continuous use.\u003c\/p\u003e\u003ch4\u003eDoes it replace a liquid pH test kit?\u003c\/h4\u003e\u003cp\u003eIt's a continuous, at-a-glance monitor rather than a precision test — it's best used alongside occasional liquid testing, not as a full replacement for it.\u003c\/p\u003e\u003ch4\u003eWill medications affect the reading?\u003c\/h4\u003e\u003cp\u003eSome dye-based medications can discolour the sensor and affect its accuracy while they're in the water.\u003c\/p\u003e\u003ch4\u003eWhere should I place it?\u003c\/h4\u003e\u003cp\u003eAnywhere it stays visible in the tank or filter — visibility is what makes it useful as an at-a-glance check.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":54773864562979,"sku":"725035-20","price":29.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-ph-alert-6-month-572259.webp?v=1790230839"},{"product_id":"seachem-alerts-combo-pack","title":"Seachem Alerts Combo Pack","description":"\u003cp\u003e\u003cstrong\u003eContinuous ammonia and pH monitoring for a freshwater aquarium, with no test kit.\u003c\/strong\u003e The Seachem Alert Combo pairs one Ammonia Alert card and one pH Alert card. Each is a colour sensor you place where you can see it, anywhere in the aquarium or filter, and it changes colour as the water changes. No chemicals or test procedures are needed.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmmonia Alert\u003c\/strong\u003e detects less than 0.05 mg\/L (ppm) of free ammonia (the toxic form of ammonia) and changes reversibly from yellow to green to blue as the level rises. Seachem states it responds to rising ammonia in about 15 minutes and takes about 4 hours to return from Toxic to Safe once the ammonia is removed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH Alert\u003c\/strong\u003e changes reversibly from yellow to orange to red across pH 5.4 to 8.0. Seachem states it takes about 30 minutes to respond when first put in, then registers pH shifts within 10 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo pack options on our store:\u003c\/strong\u003e the 6 Month pack is Seachem's Alert Combo (1 Ammonia Alert card and 1 pH Alert card). The 1 Year pack is Seachem's One Year Alert Combo, which adds 1 replacement pH Alert sensor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Seachem\u003c\/li\u003e\n\u003cli\u003eAmmonia Alert levels: Safe below 0.02 mg\/L, Alert 0.05 mg\/L, Alarm 0.2 mg\/L, Toxic 0.5 mg\/L\u003c\/li\u003e\n\u003cli\u003epH Alert range: pH 5.4 to 8.0\u003c\/li\u003e\n\u003cli\u003eAmmonia Alert life: about a year, according to Seachem\u003c\/li\u003e\n\u003cli\u003epH Alert: replace when the sensor colour visibly fades or washes out\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for freshwater aquariums. Seachem makes the pH Alert for freshwater use only, and does not recommend the Ammonia Alert at acid pH, so this pack is not suited to marine tanks or very acidic water.\u003c\/p\u003e\n\u003ch3\u003eCare\u003c\/h3\u003e\n\u003cp\u003eNo care is needed beyond wiping off algae with a clean, soft material. Do not use bleach, soap, detergents or hard objects, and avoid touching the sensors with your fingers, as skin oils can damage them. For the most accurate reading, read the Ammonia Alert under natural daylight or a daylight type light; red enhancing lights make the green and blue shades harder to see. Store an unused Ammonia Alert in a little RO water (reverse osmosis purified water) to keep the sensor wet.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eYour rights under Australian Consumer Law apply. Ships by standard parcel post.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"6 Month","offer_id":55335432651043,"sku":"725033-12","price":37.95,"currency_code":"AUD","in_stock":false},{"title":"1 Year","offer_id":54773864595747,"sku":"725034-13","price":56.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-alerts-combo-pack-43160351637795.webp?v=1790237816"},{"product_id":"red-sea-seawater-refractometer","title":"Red Sea Seawater Refractometer","description":"\u003cp\u003e\u003cstrong\u003eOne accurate salinity reading is worth more than a dozen rough ones.\u003c\/strong\u003e The Red Sea Seawater Refractometer is calibrated specifically for seawater rather than fresh water or brine, with automatic temperature compensation (ATC) built in, so a reading taken straight from the tank is close to true without needing the sample to reach a set temperature first.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeawater-specific calibration\u003c\/strong\u003e — a generic refractometer calibrated for brine or fresh water can read out by as much as 1.5 ppt on seawater; this one is built and calibrated for the job.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic temperature compensation\u003c\/strong\u003e — corrects for sample temperature against a 25°C reference, though letting the sample sit a few minutes to approach room temperature still gives the most reliable reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual scale\u003c\/strong\u003e — reads specific gravity and salinity (ppt) side by side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA couple of drops is all it takes\u003c\/strong\u003e — no test tube to fill or colour change to wait on.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded calibration screwdriver and pipette\u003c\/strong\u003e — everything needed to zero the unit and take a sample is in the box.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003ctd\u003e1.010–1.030 specific gravity \/ 20–40 ppt salinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature compensation\u003c\/th\u003e\n\u003ctd\u003eAutomatic (ATC), referenced to 25°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration method\u003c\/th\u003e\n\u003ctd\u003eZero-point calibration against RO\/DI water, adjusted with the included screwdriver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIn the box\u003c\/th\u003e\n\u003ctd\u003eRefractometer, pipette, calibration screwdriver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any marine or reef aquarium where salinity needs to be checked accurately — new water changes, top-offs, and dialling in a fresh salt mix. Not a substitute for a proper calibration routine: even with ATC, a refractometer calibrated weeks ago will drift, so re-zero it against RO\/DI water regularly rather than trusting an old calibration.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eZero the unit against a drop of RO\/DI water before each session, or at minimum every few weeks with regular use. Wipe the prism dry with a soft, lint-free cloth between readings — salt residue left to dry on the prism is the most common cause of a drifting reading. For the most repeatable results, calibrate against a 35 ppt reference fluid if you have one, rather than RO\/DI water alone.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by your consumer guarantee rights under Australian Consumer Law. This is a small, well-packaged item that ships standard parcel post.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eDo I need this if I already have a hydrometer?\u003c\/h4\u003e\u003cp\u003eA swing-arm hydrometer is accurate enough for a fish-only tank but not for reef salinity, where small errors in calcium and alkalinity dosing compound over time. A refractometer reads more precisely and doesn't have moving parts to stick or wear.\u003c\/p\u003e\u003ch4\u003eDoes it need calibration fluid to work?\u003c\/h4\u003e\u003cp\u003eNo — it calibrates against plain RO\/DI water for everyday use. A 35 ppt calibration fluid gives a more precise zero if you want to check it against a known reference occasionally.\u003c\/p\u003e\u003ch4\u003eHow accurate is it?\u003c\/h4\u003e\u003cp\u003eRed Sea doesn't publish a numeric accuracy figure for this model. What it does state is that a seawater-specific calibration avoids the up to 1.5 ppt error seen when a generic (non-seawater) refractometer is used on saltwater.\u003c\/p\u003e\u003ch4\u003eDoes it come with a carry case?\u003c\/h4\u003e\u003cp\u003eNot that we can confirm from Red Sea's own specifications — it ships with the refractometer, pipette and calibration screwdriver.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152003875,"sku":"RED197","price":125.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-seawater-refractomet-43876662444323.webp?v=1790239002"},{"product_id":"red-sea-calcium-pro-testing-kit-75-tests","title":"Red Sea Calcium Pro Testing Kit 75 Tests","description":"\u003cp\u003e\u003cstrong\u003eRead calcium to five parts per million, not to the nearest colour swatch.\u003c\/strong\u003e The Red Sea Calcium Pro Test Kit measures calcium by titration — you add titrant a drop at a time until the sample changes colour, then read the figure straight off the syringe. It resolves to 5 ppm across 75 tests, and it comes with the professional one-handed titrator that makes that resolution repeatable rather than theoretical.\u003c\/p\u003e\n\u003cp\u003eCalcium is the element stony corals build skeleton from, and it is consumed steadily rather than dramatically. A kit that can only tell you “around 400” or “around 450” cannot tell you how fast your tank is using it, which is the number your dosing actually depends on.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration rather than colour comparison\u003c\/strong\u003e — the endpoint is a distinct colour change you titrate to, so the reading does not depend on the light you are standing in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 ppm resolution\u003c\/strong\u003e — fine enough to track daily consumption, and to stay inside the 20 ppm maximum daily change Red Sea specifies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional one-handed titrator\u003c\/strong\u003e — leaves your other hand free to swirl the vial, which is what keeps consecutive tests consistent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 tests per kit\u003c\/strong\u003e — roughly eighteen months of weekly testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffectively unlimited range\u003c\/strong\u003e — a titration reads to its endpoint instead of running off the top of a printed scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefillable\u003c\/strong\u003e — the reagents are replaced on their own, so the titrator and glassware are a one-time purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReagent A, 25 mL\u003c\/li\u003e\n\u003cli\u003eReagent B, 20 g powder\u003c\/li\u003e\n\u003cli\u003eReagent C (titrant), 75 mL\u003c\/li\u003e\n\u003cli\u003eProfessional titrator, one-handed operation\u003c\/li\u003e\n\u003cli\u003e5 mL syringe\u003c\/li\u003e\n\u003cli\u003eDosing spoon for the powdered reagent\u003c\/li\u003e\n\u003cli\u003eAnalysis-grade glass vial\u003c\/li\u003e\n\u003cli\u003eColour reference card\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003cli\u003eDurable plastic storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e any calcium supplement. The kit measures calcium; it does not correct it. If the reading comes back low you will need \u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Foundation A (Calcium+)\u003c\/a\u003e or an equivalent, bought separately. Alkalinity and magnesium each need their own test kit as well — this kit reads calcium only.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21405\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eCalcium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of tests\u003c\/th\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003eUnlimited — titration reads to an endpoint rather than a fixed scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTitrator\u003c\/th\u003e\n\u003ctd\u003eProfessional, one-handed operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent refill part number\u003c\/th\u003e\n\u003ctd\u003eR21406\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eClosed, 15–25 °C, in the case, out of direct sunlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhich Red Sea Pro test do I need?\u003c\/h3\u003e\n\u003cp\u003eThe three foundation elements are consumed together and are usually tested together. Each Pro kit covers one parameter.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003cth\u003eTests\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eCalcium Pro\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eCalcium\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eKH\/Alkalinity Pro\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eCarbonate alkalinity\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e0.05 meq\/L (0.14 dKH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eMagnesium Pro\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eMagnesium\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e20 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eAll three foundation elements\u003c\/td\u003e\n\u003ctd\u003eSee product page\u003c\/td\u003e\n\u003ctd\u003eAs per the individual Pro kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are buying your first foundation test and expect to test all three, the Reef Foundation Pro Multi kit puts them in one case. If you already own the others, buy Calcium Pro on its own.\u003c\/p\u003e\n\n\u003ch3\u003eWhat calcium should I be running?\u003c\/h3\u003e\n\u003cp\u003eRed Sea publishes calcium targets as a deliberate trade-off between growth rate and coloration rather than as one correct figure.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eCalcium target\u003c\/th\u003e\n\u003cth\u003eWhat Red Sea says you get\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e450 ppm\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e430 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e430 ppm\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e410 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrag system\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUltra-low nutrient system\u003c\/th\u003e\n\u003ctd\u003e410 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eHolding a figure steadily beats hitting a better figure occasionally. Red Sea caps safe movement at 20 ppm in a single day.\u003c\/p\u003e\n\n\u003ch3\u003eHow to get a repeatable result\u003c\/h3\u003e\n\u003cp\u003eCheck salinity first and correct it if needed, then wait ten minutes before drawing your sample. Red Sea's own instruction is explicit about this, and it is the step most people skip.\u003c\/p\u003e\n\u003cp\u003eLevel the powdered Reagent B in the dosing spoon against the edge of the container. A heaped spoon shifts the endpoint and produces a high reading that will not reconcile with your other tests.\u003c\/p\u003e\n\u003cp\u003eTest at the same point in your dosing cycle each week. A sample drawn an hour after dosing and a sample drawn the night before are measuring two different things.\u003c\/p\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLow:\u003c\/strong\u003e dose \u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eFoundation A (Calcium+)\u003c\/a\u003e and re-test in three days to establish your tank's consumption rate, then move to weekly testing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh:\u003c\/strong\u003e stop dosing and let the corals draw it down. High calcium alongside high alkalinity risks precipitation, which strips both at once and leaves white scale on heaters and impellers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOn target but corals are not growing:\u003c\/strong\u003e test \u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003ealkalinity\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003emagnesium\u003c\/a\u003e. Low magnesium makes calcium and alkalinity almost impossible to hold together, and correcting it is usually what fixes a reef that tests fine and still sulks.\u003c\/p\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the glass vial and syringe in RO water after each test and let them dry. Salt residue left in the vial carries over into the next sample.\u003c\/p\u003e\n\u003cp\u003eStore the reagents closed in the case between 15 and 25 °C, away from prolonged light, and away from acids, oxidising compounds and bare metal. Red Sea states they are stable to the date printed on the pack when stored that way. When they run out, the \u003ca href=\"\/products\/red-sea-calcium-pro-reagent-refill-kit\"\u003eCalcium Pro Reagent Refill\u003c\/a\u003e restocks all three without replacing the titrator.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eReagent A carries the signal word \u003cstrong\u003eDanger\u003c\/strong\u003e. Red Sea's safety data sheet lists it as containing 10–25% sodium hydroxide: it causes severe skin burns and eye damage and may be corrosive to metals. Wear gloves and eye protection when handling it, and keep it in its original labelled bottle.\u003c\/p\u003e\n\u003cp\u003eReagent C contains EDTA at 1–5%, carries the signal word \u003cstrong\u003eWarning\u003c\/strong\u003e, and is an eye irritant. Reagent B is not classified as hazardous. Keep the whole kit out of reach of children. For eye contact, rinse with water for at least 15 minutes and seek medical attention.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef aquariums running stony corals or clams, anyone dosing a calcium supplement or running a calcium reactor, and anyone whose current calcium kit gives readings they do not trust.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums, or testing general hardness. It measures one parameter only — alkalinity and magnesium need their own kits. For a fish-only marine tank with no stony corals, calcium testing at this resolution is more precision than the system needs.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-reagent-refill-kit\"\u003eRed Sea Calcium Pro Reagent Refill\u003c\/a\u003e — restocks all three reagents when the kit runs dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Foundation A (Calcium+)\u003c\/a\u003e — the supplement this kit exists to meter.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Test Kit\u003c\/a\u003e — the parameter consumed alongside calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eRed Sea Magnesium Pro Test Kit\u003c\/a\u003e — test this before troubleshooting either of the other two.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-reef-foundation-abc-3-pack-250ml-ea\"\u003eRed Sea Reef Foundation ABC 3 Pack\u003c\/a\u003e — all three supplements together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-pro-salt-20kg-refill-box-600ltr\"\u003eRed Sea Coral Pro Salt 20 kg\u003c\/a\u003e — mixes to elevated foundation levels, so water changes support your targets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAny manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it.\u003c\/p\u003e\n\u003cp\u003eShips as a standard small parcel. Reagent volumes are well under the threshold for dangerous goods freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow accurate is the Red Sea Calcium Pro Test Kit?\u003c\/h4\u003e\n\u003cp\u003eRed Sea specifies a resolution of 5 ppm. Because the method is a titration rather than a colour comparison, the measuring range is effectively unlimited — you titrate to an endpoint instead of matching a sample against a fixed printed scale.\u003c\/p\u003e\n\u003ch4\u003eHow many tests are in the kit, and can I refill it?\u003c\/h4\u003e\n\u003cp\u003eThe kit contains 75 tests. When the reagents run out, Red Sea part R21406 restocks Reagents A, B and C for another 75 tests, and you keep the titrator, syringe, dosing spoon, glass vial and case.\u003c\/p\u003e\n\u003ch4\u003eWhat calcium level should I run in a mixed reef?\u003c\/h4\u003e\n\u003cp\u003eRed Sea publishes 450 ppm as the balance point for great growth and great coloration in a mixed reef, 465 ppm if you are prioritising growth, and 430 ppm if you are prioritising colour. Whichever you choose, hold it steadily and do not move calcium more than 20 ppm in a day.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit test alkalinity and magnesium as well?\u003c\/h4\u003e\n\u003cp\u003eNo. The Calcium Pro kit measures calcium only. Alkalinity and magnesium have their own Pro kits, or the Reef Foundation Pro Multi kit covers all three in one case.\u003c\/p\u003e\n\u003ch4\u003eWhy do my two calcium kits disagree?\u003c\/h4\u003e\n\u003cp\u003eReagent age is the most common cause — an out-of-date kit drifts. After that, check that you levelled rather than heaped the powdered reagent, that salinity was correct before sampling, and that the glass vial was rinsed and dry. Fresh reagents in a correctly run titration are the figure to trust.\u003c\/p\u003e\n\u003ch4\u003eCan I use it on a freshwater aquarium?\u003c\/h4\u003e\n\u003cp\u003eIt is designed and calibrated for marine and reef water. For freshwater hardness a general hardness test kit is the appropriate tool and costs considerably less.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152069411,"sku":"RED250","price":62.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-calcium-pro-testing-43876662575395.webp?v=1790239001"},{"product_id":"red-sea-calcium-pro-reagent-refill-kit","title":"Red Sea Calcium Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eThree reagents, seventy-five more tests, same titrator.\u003c\/strong\u003e This is the genuine Red Sea reagent refill for the Calcium Pro Test Kit — Red Sea part R21406, restocking Reagents A, B and C so the kit reads calcium to a resolution of 5 ppm again. The titrator, dosing spoon, syringe and glassware you already own stay exactly where they are.\u003c\/p\u003e\n\u003cp\u003eCalcium is not the parameter that runs out fastest, but it is the one people stop testing when the reagent runs low — and a reef dosing Foundation A blind is a reef heading somewhere you did not choose.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea part R21406\u003c\/strong\u003e — the same three-reagent set supplied in the complete kit R21405.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll three reagents in one box\u003c\/strong\u003e — Reagent A, the powdered Reagent B and the Reagent C titrant, so nothing is left half-stocked.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 ppm resolution\u003c\/strong\u003e — tight enough to see a 20 ppm daily change, which is the maximum Red Sea considers safe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration to a colour change\u003c\/strong\u003e — the endpoint is a clear shift rather than a judgement call against a printed card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheaper and less wasteful than a second kit\u003c\/strong\u003e — the titrator is the expensive part and it does not wear out.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReagent A\u003c\/li\u003e\n\u003cli\u003eReagent B (powder)\u003c\/li\u003e\n\u003cli\u003eReagent C (titrant)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTogether these restore the kit to its full 75-test count.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e the professional titrator, the 5 mL syringe, the dosing spoon for the powdered reagent, the glass vial, the colour reference card, the instruction manual and the storage case. This is chemistry only.\u003c\/p\u003e\n\u003cp\u003eIf this would be your first Red Sea calcium test, buy the \u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eRed Sea Calcium Pro Testing Kit\u003c\/a\u003e instead — without the titrator and the dosing spoon there is no way to run the test.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21406\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefill for\u003c\/th\u003e\n\u003ctd\u003eRed Sea Calcium Pro Test Kit (R21405)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eCalcium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests restored\u003c\/th\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003eUnlimited — a titration reads to its endpoint rather than off a fixed scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagents supplied\u003c\/th\u003e\n\u003ctd\u003eReagent A, Reagent B (powder), Reagent C (titrant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eClosed, 15–25 °C, out of direct sunlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat calcium should I be running?\u003c\/h3\u003e\n\u003cp\u003eRed Sea publishes calcium targets as a trade-off between how fast corals grow and how well they colour up. Higher calcium and alkalinity push growth; lower figures favour coloration.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eCalcium target\u003c\/th\u003e\n\u003cth\u003eWhat Red Sea says you get\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e450 ppm\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e430 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e430 ppm\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e410 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrag system\u003c\/th\u003e\n\u003ctd\u003e465 ppm\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUltra-low nutrient system\u003c\/th\u003e\n\u003ctd\u003e410 ppm\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBelow your target:\u003c\/strong\u003e dose \u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Foundation A (Calcium+)\u003c\/a\u003e, or the \u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a-powder\"\u003epowdered Foundation A\u003c\/a\u003e if you mix your own stock solution. Red Sea states a maximum safe rise of 20 ppm in one day.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbove your target:\u003c\/strong\u003e stop dosing and let coral demand pull it back. Calcium sitting high alongside high alkalinity risks precipitation, which strips both at once and coats heaters and pump impellers in white scale.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReading correct but corals still not growing:\u003c\/strong\u003e calcium is rarely the limiting factor on its own. Test alkalinity and magnesium before you add any more calcium — low magnesium in particular makes both of the others impossible to hold.\u003c\/p\u003e\n\n\u003ch3\u003eHow often to test\u003c\/h3\u003e\n\u003cp\u003eRed Sea's guidance is to test three days after starting a new dosing regime to see how fast the tank is consuming calcium, then settle into weekly testing once the dose is dialled in.\u003c\/p\u003e\n\u003cp\u003eAlways check salinity first and allow ten minutes after any adjustment before drawing a sample. A tank that has just had top-up water added will read low for reasons that have nothing to do with calcium.\u003c\/p\u003e\n\n\u003ch3\u003eCare and handling\u003c\/h3\u003e\n\u003cp\u003eLevel the powdered Reagent B in the dosing spoon rather than heaping it — an over-full spoon is the most common cause of a Calcium Pro result that reads high and will not reconcile with anything else.\u003c\/p\u003e\n\u003cp\u003eStore all three reagents closed, between 15 and 25 °C, in the kit's case and away from prolonged light. Red Sea states the reagents are stable up to the date printed on the pack when stored that way. Keep them away from acids, oxidising compounds and bare metal.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eReagent A is the one to respect. Red Sea's safety data sheet lists sodium hydroxide at 10–25% with the signal word \u003cstrong\u003eDanger\u003c\/strong\u003e: it may be corrosive to metals and it causes severe skin burns and eye damage. Wear eye protection and gloves, and do not decant it into an unlabelled container.\u003c\/p\u003e\n\u003cp\u003eReagent C contains EDTA at 1–5% and a trace of sodium hydroxide, carries the signal word \u003cstrong\u003eWarning\u003c\/strong\u003e, and is an eye irritant. Reagent B is not classified as hazardous.\u003c\/p\u003e\n\u003cp\u003eKeep all three out of reach of children. For eye contact, rinse with water for at least 15 minutes and seek medical attention. For skin contact, remove affected clothing and wash thoroughly with soap and water. If swallowed, do not induce vomiting — rinse the mouth and get medical advice.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e owners of the Red Sea Calcium Pro Test Kit who have run down any of the three reagents, and reef keepers dosing a calcium supplement who need better resolution than a colour-comparison kit provides.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater calcium or general hardness testing. It will not serve Red Sea's older Marine Care calcium kit, which uses different chemistry, and it is not a standalone product — there is no titrator in the box.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eRed Sea Calcium Pro Testing Kit\u003c\/a\u003e — the complete kit this refill restocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Foundation A (Calcium+)\u003c\/a\u003e — the supplement you meter against the result.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-alkalinity-pro-reagent-refill-kit\"\u003eRed Sea Alkalinity Pro Reagent Refill\u003c\/a\u003e — the partner parameter; calcium and alkalinity are consumed together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-reagent-refill-kit\"\u003eRed Sea Magnesium Pro Reagent Refill\u003c\/a\u003e — the parameter that holds the other two up.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-skeletal-elements-foundation-abc-1kg\"\u003eRed Sea Skeletal Elements Foundation ABC+ 1 kg\u003c\/a\u003e — all three foundation elements in one powder.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eRed Sea Reef Foundation Pro Multi Test Kit\u003c\/a\u003e — calcium, alkalinity and magnesium in a single case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAny manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it.\u003c\/p\u003e\n\u003cp\u003eShips as a standard small parcel. Reagent volumes are well under the threshold for dangerous goods freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests does the Red Sea Calcium Pro reagent refill provide?\u003c\/h4\u003e\n\u003cp\u003eThe refill restores the Calcium Pro Test Kit to its full 75-test count, which is the figure Red Sea specifies for the complete kit.\u003c\/p\u003e\n\u003ch4\u003eWhat comes in the Calcium Pro refill?\u003c\/h4\u003e\n\u003cp\u003eThree reagents: Reagent A, the powdered Reagent B, and Reagent C, which is the titrant. The titrator, dosing spoon, syringe, glass vial, colour card and case are not included — they come with the complete kit and are meant to last across many refills.\u003c\/p\u003e\n\u003ch4\u003eWhat is the Red Sea part number for the Calcium Pro refill?\u003c\/h4\u003e\n\u003cp\u003eThe refill is Red Sea part R21406 and the complete kit is R21405. Red Sea's safety data sheet covers both under one document because the chemistry is identical.\u003c\/p\u003e\n\u003ch4\u003eMy calcium reads correctly but my corals are not growing. Is the test wrong?\u003c\/h4\u003e\n\u003cp\u003eUsually not. Calcium, alkalinity and magnesium are consumed together, and a correct calcium figure alongside low alkalinity or low magnesium will still stall growth. Test all three before adding more calcium.\u003c\/p\u003e\n\u003ch4\u003eIs Reagent A dangerous?\u003c\/h4\u003e\n\u003cp\u003eIt requires care. Red Sea classifies Reagent A with the signal word Danger — it contains 10–25% sodium hydroxide, causes severe skin burns and eye damage, and may corrode metals. Wear gloves and eye protection, keep it in its original labelled bottle, and store it out of reach of children.\u003c\/p\u003e\n\u003ch4\u003eWhy does my result change if I heap the powder?\u003c\/h4\u003e\n\u003cp\u003eReagent B is measured by volume with the supplied spoon, so a heaped spoon puts more reagent into the vial than the method assumes and shifts the endpoint. Level the spoon against the edge of the container every time and results become repeatable.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152102179,"sku":"RED250a","price":45.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-calcium-pro-reagent-43876662608163.webp?v=1790239001"},{"product_id":"red-sea-kh-alkalinity-pro-testing-kit-75-tests","title":"Red Sea KH\/Alkalinity Pro Testing Kit 75 Tests","description":"\u003cp\u003e\u003cstrong\u003eAlkalinity read to 0.14 dKH, not guessed off a colour card.\u003c\/strong\u003e The Red Sea KH\/Alkalinity Pro Test Kit is a 75-test titration kit that measures carbonate alkalinity (KH, your tank's pH buffer) to a resolution of 0.05 meq\/L, which is 0.14 dKH. It arrives with the single-hand titrator, 68 mL of titrant, a 10 mL syringe and a 100 mL sample of Foundation B, so the first correction can be made the day it lands.\u003c\/p\u003e\n\u003cp\u003eAlkalinity is the parameter a stocked reef consumes fastest, and the one corals punish you soonest for letting swing. A kit that resolves to a seventh of a dKH shows you a drift while it is still a drift.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration, not colour matching\u003c\/strong\u003e — you read a number off a syringe scale instead of holding a vial against a printed card under kitchen lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.05 meq\/L (0.14 dKH) resolution\u003c\/strong\u003e — fine enough to separate a real trend from test-to-test noise, which a 1 dKH colour kit cannot do.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 tests per kit\u003c\/strong\u003e — about nine months of twice-weekly testing on a single reef.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-hand titrator\u003c\/strong\u003e — one hand works the plunger while the other swirls the vial, which is the difference between a repeatable endpoint and a rushed one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 mL Foundation B sample included\u003c\/strong\u003e — the buffer this kit exists to meter, enough to make your first correction before you commit to a full bottle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReagent refills available\u003c\/strong\u003e — the titrator, syringe, vial and case are designed to outlast many bottles of titrant.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-hand high-precision titrator\u003c\/li\u003e\n\u003cli\u003eTitrant, 68 mL — enough for 75 tests\u003c\/li\u003e\n\u003cli\u003e10 mL syringe\u003c\/li\u003e\n\u003cli\u003eAnalytical-grade glass vial\u003c\/li\u003e\n\u003cli\u003eColour reference card\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003cli\u003e100 mL sample of Red Sea Foundation B (KH\/Alkalinity)\u003c\/li\u003e\n\u003cli\u003eChemical-resistant plastic storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA full-size bottle of buffer. The 100 mL Foundation B sample is a starter, not a supply — \u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b\"\u003eRed Sea Foundation B\u003c\/a\u003e is sold separately.\u003c\/li\u003e\n\u003cli\u003eCalcium and magnesium tests. Those are the \u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eCalcium Pro\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eMagnesium Pro\u003c\/a\u003e kits, or all three together in the \u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi Test Kit\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eA refractometer or salinity meter. Salinity has to be correct before an alkalinity result means anything.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21410\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eCarbonate alkalinity (KH, the tank's pH buffer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of tests\u003c\/th\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e0.05 meq\/L (0.14 dKH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003eNot fixed — a titration reads to its endpoint rather than off a printed scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTitrant supplied\u003c\/th\u003e\n\u003ctd\u003e68 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample syringe\u003c\/th\u003e\n\u003ctd\u003e10 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplement metered\u003c\/th\u003e\n\u003ctd\u003eRed Sea Foundation B (KH\/Alkalinity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent refill\u003c\/th\u003e\n\u003ctd\u003eRed Sea part R21411\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eOriginal containers, closed, cool and dry, out of direct sunlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat alkalinity should I be running?\u003c\/h3\u003e\n\u003cp\u003eThere is no single correct figure. Red Sea publishes foundation targets by system type in its Foundation Supplements manual, and alkalinity only makes sense read alongside the calcium and magnesium it is balanced against.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eAlkalinity\u003c\/th\u003e\n\u003cth\u003eCalcium\u003c\/th\u003e\n\u003cth\u003eMagnesium\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e11.5 dKH (4.1 meq\/L)\u003c\/td\u003e\n\u003ctd\u003e450 mg\/L\u003c\/td\u003e\n\u003ctd\u003e1350 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e8.0 dKH (2.9 meq\/L)\u003c\/td\u003e\n\u003ctd\u003e430 mg\/L\u003c\/td\u003e\n\u003ctd\u003e1280 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMarine fish only\u003c\/th\u003e\n\u003ctd\u003e6.8 dKH (2.4 meq\/L)\u003c\/td\u003e\n\u003ctd\u003e370 mg\/L\u003c\/td\u003e\n\u003ctd\u003e1100 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eRed Sea's wider Reef Care guidance spans roughly 7 to 12 dKH, trading growth rate against coloration. Pick a target, hold it, and move it slowly if you change your mind. Stability beats the number.\u003c\/p\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003ch4\u003eBelow your target\u003c\/h4\u003e\n\u003cp\u003eDose \u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b\"\u003eRed Sea Foundation B\u003c\/a\u003e, the buffer this kit meters. Red Sea states a maximum safe increase of 1.4 dKH (0.5 meq\/L) in a single day — going faster stresses corals rather than helping them.\u003c\/p\u003e\n\u003ch4\u003eAbove your target\u003c\/h4\u003e\n\u003cp\u003eStop dosing and let consumption bring it down, or dilute it with a water change. Do not chase alkalinity downwards with acid.\u003c\/p\u003e\n\u003ch4\u003eDrifting when nothing has changed\u003c\/h4\u003e\n\u003cp\u003eCalcium, alkalinity and magnesium move as a set. A stubborn alkalinity reading is usually low magnesium, so test all three before adjusting any of them.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Red Sea alkalinity test do I need?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eChoose it when\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKH\/Alkalinity Pro (this kit)\u003c\/th\u003e\n\u003ctd\u003e0.14 dKH\u003c\/td\u003e\n\u003ctd\u003eYou keep corals and dose a buffer, so small movements matter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMarine Care alkalinity test\u003c\/th\u003e\n\u003ctd\u003e1 dKH (0.36 meq\/L)\u003c\/td\u003e\n\u003ctd\u003eFish-only or a maturing system, where a whole dKH is close enough\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eSame Pro chemistry\u003c\/td\u003e\n\u003ctd\u003eYou want calcium, alkalinity and magnesium in one case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eCorrect salinity before you test. An alkalinity reading taken at the wrong specific gravity is measuring the wrong water.\u003c\/p\u003e\n\u003cp\u003eRinse the glass vial in RO water between tests. Leftover titrant is one of the two things that quietly bias a result; the other is reagent age.\u003c\/p\u003e\n\u003cp\u003eStore the titrant closed, in its original container, in the kit's case, cool and dry and out of direct sun. If a fresh bottle of titrant reads noticeably differently from the one you were finishing, trust the fresh one.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eRed Sea's safety data sheet for this kit and its refill carries the signal word \u003cstrong\u003eWarning\u003c\/strong\u003e. The titrant is listed as monoethylene glycol (an antifreeze-type solvent) at 50–75%, harmful if swallowed, and hydrochloric acid at under 1%, which can cause severe skin and eye burns and may irritate the airways.\u003c\/p\u003e\n\u003cp\u003eKeep it out of reach of children and away from acids, alkalis, oxidisers and metals. In the eyes, rinse with plenty of water for at least 15 minutes and get medical attention. If swallowed, do not induce vomiting — rinse the mouth thoroughly and get medical attention.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef aquariums of any size where corals are consuming alkalinity, anyone dosing a two- or three-part supplement and needing to meter it, and anyone whose colour-card kit reads the same before and after a dose.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater KH testing, where a low-cost colour kit is entirely adequate and this resolution is wasted. It also will not tell you calcium or magnesium, and it is not a replacement for a salinity check.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-alkalinity-pro-reagent-refill-kit\"\u003eRed Sea Alkalinity Pro Reagent Refill\u003c\/a\u003e — part R21411, restores all 75 tests without rebuying the titrator.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b\"\u003eRed Sea Foundation B (KH\/Alkalinity)\u003c\/a\u003e — the full-size buffer you dose against the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eRed Sea Magnesium Pro Test Kit\u003c\/a\u003e — the parameter that explains most stubborn alkalinity readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eRed Sea Calcium Pro Test Kit\u003c\/a\u003e — the third of the foundation trio.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-reef-foundation-abc-3-pack-250ml-ea\"\u003eRed Sea Reef Foundation ABC 3 Pack\u003c\/a\u003e — all three supplements together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/red-sea-1\"\u003eRed Sea range\u003c\/a\u003e — salts, supplements and the rest of the Reef Care program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eReagents are consumables and carry no service warranty. Any manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it. A kit arriving with leaking, damaged or out-of-date reagents is replaced.\u003c\/p\u003e\n\u003cp\u003eShips as a standard parcel. The reagent volumes are well under the threshold for dangerous goods handling, so no special freight applies.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow accurate is the Red Sea KH\/Alkalinity Pro Test Kit?\u003c\/h4\u003e\n\u003cp\u003eRed Sea specifies a resolution of 0.05 meq\/L, which is 0.14 dKH. Because it is a titration rather than a colour comparison, the measurement is not bounded by a printed scale — you titrate to an endpoint and read the volume used.\u003c\/p\u003e\n\u003ch4\u003eHow many tests are in the kit, and what does a refill cost me?\u003c\/h4\u003e\n\u003cp\u003eThe kit contains 68 mL of titrant, enough for 75 tests. The reagent refill is Red Sea part R21411 and restores the full 75-test count, so you only ever buy the titrator, syringe, vial and case once.\u003c\/p\u003e\n\u003ch4\u003eDoes the kit include the alkalinity supplement?\u003c\/h4\u003e\n\u003cp\u003eIt includes a 100 mL sample of Red Sea Foundation B, which is enough to make an initial correction but is not an ongoing supply. A full-size bottle of Foundation B is bought separately.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit on a freshwater aquarium?\u003c\/h4\u003e\n\u003cp\u003eThe chemistry will measure carbonate hardness in fresh water, but the kit is built around the resolution a reef needs. For a freshwater or planted tank a standard colour-comparison KH kit is cheaper and perfectly adequate.\u003c\/p\u003e\n\u003ch4\u003eMy alkalinity keeps falling no matter how much buffer I dose. What is wrong?\u003c\/h4\u003e\n\u003cp\u003eTest magnesium. Magnesium holds calcium and alkalinity in solution, and when it runs low both of the others become impossible to hold no matter how much you dose. Correct magnesium first, then re-test alkalinity.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test alkalinity?\u003c\/h4\u003e\n\u003cp\u003eRed Sea's Reef Care approach is built on regular testing rather than a fixed interval, and most reefers with a stocked coral load test two or three times a week. On a new or heavily stocked system, test more often until the daily consumption rate is known.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152134947,"sku":"RED251","price":60.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-kh-alkalinity-pro-te-43876662935843.webp?v=1790239000"},{"product_id":"red-sea-alkalinity-pro-reagent-refill-kit","title":"Red Sea Alkalinity Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eFresh titrant, not a whole new test kit.\u003c\/strong\u003e This is the genuine Red Sea reagent refill for the KH\/Alkalinity Pro Test Kit — Red Sea part R21411, the same titrant that ships in the complete kit R21410. It restores the kit to its full 75 tests at a resolution of 0.05 meq\/L (0.14 dKH), and it keeps the titrator, syringe and glass vial you already own in service.\u003c\/p\u003e\n\u003cp\u003eAlkalinity is the parameter a stocked reef pulls down fastest, so it is the one most reefers test most often — and the first reagent bottle to run dry.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea part R21411\u003c\/strong\u003e — the same titrant supplied in the complete KH\/Alkalinity Pro kit, not a third-party substitute.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores the full 75 tests\u003c\/strong\u003e — a whole kit's worth of testing without buying a second titrator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.05 meq\/L (0.14 dKH) resolution\u003c\/strong\u003e — fine enough to catch a drift while it is still a drift, not after the corals have browned out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration, not colour matching\u003c\/strong\u003e — you read a number off a syringe scale instead of holding a vial against a printed card under kitchen lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh, in-date chemistry\u003c\/strong\u003e — the single most common cause of two test kits disagreeing is one of them being old.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRed Sea KH\/Alkalinity Pro titrant reagent, enough for 75 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e the titrator, the 10 mL syringe, the glass vial, the colour reference card, the instruction manual, the storage case, and the 100 mL sample of Foundation B that ships with the complete kit. This is reagent only.\u003c\/p\u003e\n\u003cp\u003eIf you do not already own the \u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Test Kit\u003c\/a\u003e, buy the kit rather than this refill — on its own there is nothing here to titrate with.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21411\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefill for\u003c\/th\u003e\n\u003ctd\u003eRed Sea KH\/Alkalinity Pro Test Kit (R21410)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eCarbonate alkalinity (KH, your tank's pH buffer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests restored\u003c\/th\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e0.05 meq\/L (0.14 dKH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003eUnlimited — a titration reads to its endpoint rather than off a fixed scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent supplied\u003c\/th\u003e\n\u003ctd\u003eTitrant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eClosed, 15–25 °C, out of direct sunlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat alkalinity should I be running?\u003c\/h3\u003e\n\u003cp\u003eThere is no single correct number. Red Sea's Reef Care programme publishes alkalinity targets as a trade-off between growth rate and coloration, and the figure you pick depends on which you are chasing.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eAlkalinity target\u003c\/th\u003e\n\u003cth\u003eWhat Red Sea says you get\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e12 dKH\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e11.5 dKH\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e8 dKH\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e12 dKH\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e8 dKH\u003c\/td\u003e\n\u003ctd\u003eGreat growth, great coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e7 dKH\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrag system\u003c\/th\u003e\n\u003ctd\u003e12 dKH\u003c\/td\u003e\n\u003ctd\u003eExceptional growth, good coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUltra-low nutrient system\u003c\/th\u003e\n\u003ctd\u003e7 dKH\u003c\/td\u003e\n\u003ctd\u003eGood growth, exceptional coloration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eStability matters more than the number itself. Pick a target, hold it, and change it slowly if you change your mind.\u003c\/p\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBelow your target:\u003c\/strong\u003e dose \u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b\"\u003eRed Sea Foundation B (KH\/Alkalinity)\u003c\/a\u003e, which is the supplement this test kit exists to meter. Red Sea states a maximum safe increase of 1.4 dKH (0.5 meq\/L) in a single day — going faster stresses corals rather than helping them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbove your target:\u003c\/strong\u003e stop dosing and let consumption bring it down, or dilute with a water change. Do not chase it downwards with acid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDrifting when nothing has changed:\u003c\/strong\u003e calcium, alkalinity and magnesium move as a set. A stubborn alkalinity reading usually means magnesium is low, so test all three before adjusting any of them.\u003c\/p\u003e\n\n\u003ch3\u003eCare and handling\u003c\/h3\u003e\n\u003cp\u003eCheck and correct salinity before testing anything. Red Sea's guidance is to allow ten minutes after a salinity adjustment for the tank to stabilise before you draw a sample.\u003c\/p\u003e\n\u003cp\u003eStore the reagent closed, between 15 and 25 °C, and keep it in the kit's plastic case — prolonged light exposure is what degrades it. Red Sea states the reagent is stable up to the date printed on the pack when stored that way.\u003c\/p\u003e\n\u003cp\u003eIf a fresh refill reads noticeably differently from your old bottle, trust the fresh one. That gap is the reagent you were still using telling you it had aged out.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eThe titrant carries a GHS signal word of \u003cstrong\u003eWarning\u003c\/strong\u003e. Red Sea's safety data sheet lists monoethylene glycol (an antifreeze-type solvent) at 50–75%, classified as harmful if swallowed, and hydrochloric acid at under 1%, which can cause severe skin and eye burns and may irritate the airways.\u003c\/p\u003e\n\u003cp\u003eKeep it out of reach of children. Do not eat, drink or smoke while using it. If it gets in your eyes, rinse with water for at least 15 minutes and seek medical attention. Do not induce vomiting if swallowed — rinse the mouth and get medical advice.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e anyone who already owns a Red Sea KH\/Alkalinity Pro Test Kit and has run down the reagent, and anyone keeping a marine or reef aquarium who needs alkalinity resolution finer than a colour-card kit can give.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater KH testing, where a low-cost colour kit is entirely adequate. It is also not a substitute for the complete kit — there is no titrator or glassware in this box — and it will not fit Red Sea's older Marine Care alkalinity kit, which uses different chemistry.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Testing Kit\u003c\/a\u003e — the kit this refill restocks, if you need the titrator too.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b\"\u003eRed Sea Foundation B (KH\/Alkalinity)\u003c\/a\u003e — the buffer you dose against the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-reagent-refill-kit\"\u003eRed Sea Calcium Pro Reagent Refill\u003c\/a\u003e — the second of the three foundation parameters.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-reagent-refill-kit\"\u003eRed Sea Magnesium Pro Reagent Refill\u003c\/a\u003e — the third, and the one that quietly explains most alkalinity problems.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-reef-foundation-abc-3-pack-250ml-ea\"\u003eRed Sea Reef Foundation ABC 3 Pack\u003c\/a\u003e — all three supplements together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eRed Sea Reef Foundation Pro Multi Test Kit\u003c\/a\u003e — calcium, alkalinity and magnesium in one case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAny manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it.\u003c\/p\u003e\n\u003cp\u003eShips as a standard small parcel. The reagent volume is well under the threshold for dangerous goods handling, so no special freight applies.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests does the Red Sea Alkalinity Pro reagent refill provide?\u003c\/h4\u003e\n\u003cp\u003eThe refill restores the KH\/Alkalinity Pro Test Kit to its full 75-test count, which is the number of tests Red Sea specifies for the complete kit.\u003c\/p\u003e\n\u003ch4\u003eDoes the refill include the titrator?\u003c\/h4\u003e\n\u003cp\u003eNo. The refill is reagent only. The titrator, syringe, glass vial, colour card, manual and case all come with the complete KH\/Alkalinity Pro Test Kit and are designed to be kept and reused across many refills.\u003c\/p\u003e\n\u003ch4\u003eWhat is the Red Sea part number for the KH\/Alkalinity Pro refill?\u003c\/h4\u003e\n\u003cp\u003eThe refill is Red Sea part R21411. The complete kit is R21410. Both are covered by the same Red Sea safety data sheet, because the refill supplies the same titrant.\u003c\/p\u003e\n\u003ch4\u003eHow accurate is the Red Sea Alkalinity Pro test?\u003c\/h4\u003e\n\u003cp\u003eRed Sea specifies a resolution of 0.05 meq\/L, which is 0.14 dKH. Because it is a titration rather than a colour comparison, the range is effectively unlimited — you titrate to an endpoint instead of matching against a fixed printed scale.\u003c\/p\u003e\n\u003ch4\u003eDo the reagents expire?\u003c\/h4\u003e\n\u003cp\u003eYes. Red Sea states the reagent is stable up to the date printed on the pack when stored closed between 15 and 25 °C and kept in its case away from prolonged light. Reagent age is the usual explanation when two alkalinity kits disagree with each other.\u003c\/p\u003e\n\u003ch4\u003eCan I use this refill in a freshwater aquarium?\u003c\/h4\u003e\n\u003cp\u003eThe chemistry will measure carbonate hardness in fresh water, but this kit is built and calibrated around the resolution a reef needs. For a freshwater tank a standard colour-comparison KH kit is cheaper and perfectly adequate.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152167715,"sku":"RED251a","price":45.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-alkalinity-pro-reage-43876662968611.webp?v=1790239002"},{"product_id":"red-sea-magnesium-pro-testing-kit-100-tests","title":"Red Sea Magnesium Pro Testing Kit 100 Tests","description":"\u003cp\u003e\u003cstrong\u003eThe test that explains why calcium and alkalinity will not sit still.\u003c\/strong\u003e The Red Sea Magnesium Pro Test Kit is a 100-test titration kit that reads magnesium to a resolution of 20 ppm. Magnesium is what keeps calcium and carbonate in solution instead of precipitating out, so when the other two foundation parameters refuse to hold, this is the kit that finds the reason.\u003c\/p\u003e\n\u003cp\u003eIt is the least glamorous of the three foundation tests and the one most reefers own last. It is also the one that turns a fortnightly guess into a number.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests per kit\u003c\/strong\u003e — the largest test count in Red Sea's Pro foundation range, which suits a parameter you check fortnightly rather than daily.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 ppm resolution\u003c\/strong\u003e — meaningful against targets of 1100 to 1350 mg\/L, where a broad colour kit reads the same at 1150 and 1300.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration with a powder reagent step\u003c\/strong\u003e — a dosing spoon and two liquid reagents set the sample up, then you titrate to a clear colour break.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-hand titrator\u003c\/strong\u003e — one hand meters, the other swirls, so the endpoint is where the chemistry says it is rather than where your grip gave out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeters Foundation C directly\u003c\/strong\u003e — the reading maps onto a dose of Red Sea's magnesium supplement rather than a general recommendation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReagent refills available\u003c\/strong\u003e — part R21416 restores all 100 tests and keeps the titrator, spoon and glassware in service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-hand high-precision titrator\u003c\/li\u003e\n\u003cli\u003eReagent A, 25 mL\u003c\/li\u003e\n\u003cli\u003eReagent B, 25 mL\u003c\/li\u003e\n\u003cli\u003eTitrant, 75 mL\u003c\/li\u003e\n\u003cli\u003e5 mL syringe\u003c\/li\u003e\n\u003cli\u003eDosing spoon\u003c\/li\u003e\n\u003cli\u003eAnalytical-grade glass vials\u003c\/li\u003e\n\u003cli\u003eColour reference card\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003cli\u003eChemical-resistant plastic storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAny magnesium supplement. Unlike the alkalinity kit, no sample bottle ships with this one — \u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Foundation C (Magnesium)\u003c\/a\u003e is a separate purchase.\u003c\/li\u003e\n\u003cli\u003eCalcium and alkalinity tests. Those are the \u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eCalcium Pro\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eKH\/Alkalinity Pro\u003c\/a\u003e kits.\u003c\/li\u003e\n\u003cli\u003eA salinity meter. Magnesium tracks with salinity, so a reading taken at the wrong specific gravity is misleading rather than merely imprecise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21415\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber of tests\u003c\/th\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e20 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003eNot fixed — a titration reads to its endpoint rather than off a printed scale\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent A\u003c\/th\u003e\n\u003ctd\u003e25 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent B\u003c\/th\u003e\n\u003ctd\u003e25 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTitrant\u003c\/th\u003e\n\u003ctd\u003e75 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample syringe\u003c\/th\u003e\n\u003ctd\u003e5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplement metered\u003c\/th\u003e\n\u003ctd\u003eRed Sea Foundation C (Magnesium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagent refill\u003c\/th\u003e\n\u003ctd\u003eRed Sea part R21416\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eOriginal containers, closed, cool and dry, away from acids, alkalis, oxidisers and metals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat magnesium should I be running?\u003c\/h3\u003e\n\u003cp\u003eRed Sea publishes foundation targets by system type in its Foundation Supplements manual. Magnesium is set proportionally to the calcium and alkalinity you are holding, which is why all three appear together here.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eMagnesium\u003c\/th\u003e\n\u003cth\u003eCalcium\u003c\/th\u003e\n\u003cth\u003eAlkalinity\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef\u003c\/th\u003e\n\u003ctd\u003e1350 mg\/L\u003c\/td\u003e\n\u003ctd\u003e450 mg\/L\u003c\/td\u003e\n\u003ctd\u003e11.5 dKH (4.1 meq\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS dominant\u003c\/th\u003e\n\u003ctd\u003e1280 mg\/L\u003c\/td\u003e\n\u003ctd\u003e430 mg\/L\u003c\/td\u003e\n\u003ctd\u003e8.0 dKH (2.9 meq\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMarine fish only\u003c\/th\u003e\n\u003ctd\u003e1100 mg\/L\u003c\/td\u003e\n\u003ctd\u003e370 mg\/L\u003c\/td\u003e\n\u003ctd\u003e6.8 dKH (2.4 meq\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAt 20 ppm resolution, the gap between the mixed reef and SPS targets is about three and a half increments — wide enough that this kit can actually tell you which programme you are running.\u003c\/p\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003ch4\u003eBelow your target\u003c\/h4\u003e\n\u003cp\u003eDose \u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Foundation C\u003c\/a\u003e, which is the supplement this kit exists to meter. Magnesium moves slowly and is consumed slowly, so correct it over days rather than in one hit.\u003c\/p\u003e\n\u003ch4\u003eAbove your target\u003c\/h4\u003e\n\u003cp\u003eStop dosing. Magnesium has no fast removal route in a reef aquarium, so the only practical correction is water changes with a salt mixed to your target, and time.\u003c\/p\u003e\n\u003ch4\u003eCalcium or alkalinity will not hold\u003c\/h4\u003e\n\u003cp\u003eThis is the classic symptom of low magnesium and the main reason to own this kit. Bring magnesium back to target first, then re-test the other two — they often correct themselves once magnesium is right.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Red Sea magnesium test do I need?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003cth\u003eTests\u003c\/th\u003e\n\u003cth\u003eChoose it when\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnesium Pro (this kit)\u003c\/th\u003e\n\u003ctd\u003e100, 20 ppm resolution\u003c\/td\u003e\n\u003ctd\u003eYou dose foundation supplements and need to meter Foundation C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-marine-care-magnesium-test-kit\"\u003eMarine Care Magnesium\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003e75, 50–100 ppm resolution\u003c\/td\u003e\n\u003ctd\u003eYou want the accessible tier of Red Sea's magnesium testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi\u003c\/a\u003e\u003c\/th\u003e\n\u003ctd\u003eSame Pro chemistry, all three\u003c\/td\u003e\n\u003ctd\u003eYou need calcium and alkalinity as well and want one case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eLevel the dosing spoon. The powder step is measured by volume, and a heaped spoon shifts the endpoint further than the kit's 20 ppm resolution.\u003c\/p\u003e\n\u003cp\u003eRinse the glass vials in RO water between tests. Residual reagent from the previous test is the most common cause of a magnesium result that disagrees with the last one.\u003c\/p\u003e\n\u003cp\u003eStore the reagents in their original containers, closed, cool, dry and out of direct sunlight, and away from acids, alkalis, oxidising compounds and metals. Reagent age is the usual explanation when two kits disagree with each other.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eRed Sea's safety data sheet for this kit and its refill gives Reagent A the signal word \u003cstrong\u003eDanger\u003c\/strong\u003e. Reagent A is classified as harmful if swallowed and harmful in contact with skin, causes severe skin burns and eye damage, and may be corrosive to metals. The named constituents are sodium tetraborate decahydrate at 1–5%, potassium hydroxide at 1–5% and oxalic acid at 1–5%. Reagents B and C carry no signal word.\u003c\/p\u003e\n\u003cp\u003eSodium tetraborate is classified as a reproductive hazard, so handle Reagent A with care and keep the kit out of reach of children. In the eyes, rinse with plenty of water for at least 15 minutes and get medical attention. If swallowed, do not induce vomiting — rinse the mouth thoroughly with water if the person is conscious, and get medical attention.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef aquariums running a foundation dosing programme, anyone whose calcium or alkalinity refuses to stabilise, and anyone mixing their own saltwater who wants to confirm what the batch actually landed at.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums, where magnesium at these concentrations is not a parameter you manage. It also will not measure calcium or alkalinity, and it is not a substitute for correcting salinity before you test.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-reagent-refill-kit\"\u003eRed Sea Magnesium Pro Reagent Refill\u003c\/a\u003e — part R21416, restores all 100 tests without rebuying the titrator.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Foundation C (Magnesium)\u003c\/a\u003e — the supplement you dose against the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Test Kit\u003c\/a\u003e — the parameter magnesium is usually blamed for.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-testing-kit-75-tests\"\u003eRed Sea Calcium Pro Test Kit\u003c\/a\u003e — completes the foundation trio.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-pro-salt-20kg-refill-box-600ltr\"\u003eRed Sea Coral Pro Salt 20 kg\u003c\/a\u003e — mixes to elevated foundation levels, so water changes hold magnesium up rather than diluting it.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/red-sea-1\"\u003eRed Sea range\u003c\/a\u003e — the rest of the Reef Care testing and supplement program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eReagents are consumables and carry no service warranty. Any manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it. A kit arriving with leaking, damaged or out-of-date reagents is replaced.\u003c\/p\u003e\n\u003cp\u003eShips as a standard parcel. The reagent volumes are well under the threshold for dangerous goods handling, so no special freight applies.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow accurate is the Red Sea Magnesium Pro Test Kit?\u003c\/h4\u003e\n\u003cp\u003eRed Sea specifies a resolution of 20 ppm. Because it is a titration rather than a colour comparison, the reading is not bounded by a printed scale — you titrate to an endpoint and read the volume used off the titrator.\u003c\/p\u003e\n\u003ch4\u003eHow many tests does the kit contain?\u003c\/h4\u003e\n\u003cp\u003eThe Red Sea Magnesium Pro Test Kit contains 100 tests, supplied as 25 mL of Reagent A, 25 mL of Reagent B and 75 mL of titrant. The reagent refill, part R21416, restores the same 100-test count.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test magnesium?\u003c\/h4\u003e\n\u003cp\u003eMagnesium is consumed far more slowly than calcium or alkalinity, so fortnightly testing suits most reef aquariums. Test it immediately, though, whenever calcium or alkalinity start behaving oddly — that is nearly always a magnesium problem.\u003c\/p\u003e\n\u003ch4\u003eWhat magnesium level should a reef tank run at?\u003c\/h4\u003e\n\u003cp\u003eRed Sea's published foundation targets are 1350 mg\/L for a mixed reef, 1280 mg\/L for an SPS-dominant system and 1100 mg\/L for marine fish only. Magnesium is set proportionally to the calcium and alkalinity levels you are holding, not chosen independently.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit include a magnesium supplement?\u003c\/h4\u003e\n\u003cp\u003eNo. Unlike the KH\/Alkalinity Pro kit, which ships with a 100 mL sample of Foundation B, the Magnesium Pro kit contains reagents and hardware only. Foundation C is bought separately.\u003c\/p\u003e\n\u003ch4\u003eMy magnesium is too high. How do I bring it down?\u003c\/h4\u003e\n\u003cp\u003eThere is no quick fix. Magnesium is not consumed fast enough or removed by any common filtration to drop on its own, so the practical correction is to stop dosing and do water changes with saltwater mixed to your target level.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152200483,"sku":"RED252","price":69.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-magnesium-pro-testin-46119456735523.webp?v=1790239004"},{"product_id":"red-sea-magnesium-pro-reagent-refill-kit","title":"Red Sea Magnesium Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eA hundred more tests without a second titrator.\u003c\/strong\u003e This is the genuine Red Sea Magnesium Pro reagent refill, part R21416. It restocks the chemistry in the Magnesium Pro Test Kit (R21415) and restores the full 100 tests at Red Sea's stated 20 ppm resolution, while the titrator, dosing spoon, syringe, glass vials and case you already own stay exactly where they are.\u003c\/p\u003e\n\u003cp\u003eMagnesium is tested less often than alkalinity, so this bottle tends to run out on a longer clock — and to be the reagent most likely to have aged before it emptied.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea part R21416\u003c\/strong\u003e — the same reagents supplied in the complete Magnesium Pro kit, not a third-party substitute.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestores the full 100 tests\u003c\/strong\u003e — the same test count as a new kit, which is the largest in Red Sea's Pro foundation range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20 ppm resolution retained\u003c\/strong\u003e — fresh reagent is what that figure assumes; an aged bottle quietly stops delivering it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps the hardware\u003c\/strong\u003e — the titrator and dosing spoon are built to outlast many refills, so there is no reason to buy them twice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixes disagreeing kits\u003c\/strong\u003e — when two magnesium tests give different answers, the older reagent is almost always the one that is wrong.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRed Sea Magnesium Pro reagents, enough to restore 100 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cp\u003eThis is reagent only. The \u003cstrong\u003etitrator, dosing spoon, 5 mL syringe, glass vials, colour reference card, instruction manual and storage case\u003c\/strong\u003e all ship with the complete kit and are not repeated here.\u003c\/p\u003e\n\u003cp\u003eIf you do not already own the \u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eRed Sea Magnesium Pro Test Kit\u003c\/a\u003e, buy the kit instead — on its own there is nothing in this box to titrate with, and no spoon to measure the powder step.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21416\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefill for\u003c\/th\u003e\n\u003ctd\u003eRed Sea Magnesium Pro Test Kit (R21415)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests restored\u003c\/th\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e20 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplement metered\u003c\/th\u003e\n\u003ctd\u003eRed Sea Foundation C (Magnesium)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eOriginal containers, closed, cool and dry, away from acids, alkalis, oxidisers and metals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWill this fit my kit?\u003c\/h3\u003e\n\u003cp\u003eIt fits the Red Sea Magnesium Pro Test Kit, part R21415 — the titration kit with the single-hand titrator and the dosing spoon.\u003c\/p\u003e\n\u003cp\u003eIt does \u003cstrong\u003enot\u003c\/strong\u003e fit Red Sea's Marine Care magnesium test, which uses different chemistry, and it does not fit the magnesium test inside the \u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi Test Kit\u003c\/a\u003e unless that kit's magnesium module is the Pro test. Check the reagent bottle labels against R21416 before ordering if you are unsure which kit you own.\u003c\/p\u003e\n\n\u003ch3\u003eCare and handling\u003c\/h3\u003e\n\u003cp\u003eLevel the dosing spoon every time. The powder step is measured by volume, and a heaped spoon moves the endpoint further than the 20 ppm the kit resolves to.\u003c\/p\u003e\n\u003cp\u003eRinse the vials in RO water between tests, and check salinity before you draw a sample — magnesium tracks with salinity, so a reading taken at the wrong specific gravity is misleading rather than merely imprecise.\u003c\/p\u003e\n\u003cp\u003eStore the reagents closed in their original containers, cool, dry and out of direct sun, away from acids, alkalis, oxidising compounds and metals. If a fresh refill reads differently from the bottle you were finishing, trust the fresh one.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eRed Sea's safety data sheet covers this refill and the complete kit together, and gives Reagent A the signal word \u003cstrong\u003eDanger\u003c\/strong\u003e. Reagent A is classified as harmful if swallowed and harmful in contact with skin, causes severe skin burns and eye damage, and may be corrosive to metals. The named constituents are sodium tetraborate decahydrate at 1–5%, which carries a reproductive hazard classification, potassium hydroxide at 1–5% and oxalic acid at 1–5%. Reagents B and C carry no signal word.\u003c\/p\u003e\n\u003cp\u003eKeep out of reach of children. In the eyes, rinse with plenty of water for at least 15 minutes and get medical attention. If swallowed, do not induce vomiting — rinse the mouth thoroughly with water if the person is conscious, and get medical attention.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e anyone who already owns a Red Sea Magnesium Pro Test Kit and has run the reagents down or out of date.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e a first purchase — there is no titrator, spoon or glassware in this box. It is also not for freshwater use, and it will not measure calcium or alkalinity.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-magnesium-pro-testing-kit-100-tests\"\u003eRed Sea Magnesium Pro Testing Kit\u003c\/a\u003e — the kit this refill restocks, if you need the titrator too.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Foundation C (Magnesium)\u003c\/a\u003e — the supplement you dose against the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-alkalinity-pro-reagent-refill-kit\"\u003eRed Sea Alkalinity Pro Reagent Refill\u003c\/a\u003e — the reagent that empties fastest of the three.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-calcium-pro-reagent-refill-kit\"\u003eRed Sea Calcium Pro Reagent Refill\u003c\/a\u003e — the third foundation parameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-reef-foundation-abc-3-pack-250ml-ea\"\u003eRed Sea Reef Foundation ABC 3 Pack\u003c\/a\u003e — all three supplements together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/red-sea-1\"\u003eRed Sea range\u003c\/a\u003e — the rest of the Reef Care testing and supplement program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eReagents are consumables and carry no service warranty. Any manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it.\u003c\/p\u003e\n\u003cp\u003eShips as a standard small parcel. The reagent volumes are well under the threshold for dangerous goods handling, so no special freight applies.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests does the Red Sea Magnesium Pro reagent refill provide?\u003c\/h4\u003e\n\u003cp\u003eThe refill restores the Magnesium Pro Test Kit to its full 100-test count, which is the number of tests Red Sea specifies for the complete kit.\u003c\/p\u003e\n\u003ch4\u003eWhat is the Red Sea part number for this refill?\u003c\/h4\u003e\n\u003cp\u003eThe refill is Red Sea part R21416. The complete kit is R21415. Both are covered by the same Red Sea safety data sheet, because the refill supplies the same reagents.\u003c\/p\u003e\n\u003ch4\u003eDoes the refill include the titrator or the dosing spoon?\u003c\/h4\u003e\n\u003cp\u003eNo. The refill is reagent only. The titrator, dosing spoon, syringe, glass vials, colour card, manual and case all come with the complete Magnesium Pro Test Kit and are designed to be reused across many refills.\u003c\/p\u003e\n\u003ch4\u003eDo the reagents expire?\u003c\/h4\u003e\n\u003cp\u003eYes, and magnesium reagent is more likely than most to age out before it empties, because magnesium is typically tested fortnightly rather than several times a week. Check the date on the pack, and replace the reagent if a result stops agreeing with your other tests.\u003c\/p\u003e\n\u003ch4\u003eWill this refill work in Red Sea's Marine Care magnesium test?\u003c\/h4\u003e\n\u003cp\u003eNo. The Marine Care magnesium test uses different chemistry from the Pro titration kit, and the reagents are not interchangeable. This refill is specific to the Magnesium Pro Test Kit, part R21415.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152233251,"sku":"RED252a","price":45.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-magnesium-pro-reagen-46119440023843.webp?v=1790239001"},{"product_id":"red-sea-nitrate-pro-testing-kit-100-tests","title":"Red Sea Nitrate Pro Testing Kit 100 Tests","description":"\u003cp\u003e\u003cstrong\u003eThe Nitrate Pro kit is Red Sea's high-resolution colorimetric test for nitrate (NO3) in marine and reef aquariums.\u003c\/strong\u003e Reagents develop colour in a glass vial, matched against a reference card inside a comparator, giving finer resolution than a dip strip without needing a photometer.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh resolution\u003c\/strong\u003e — reads nitrate to 0.125 ppm NO3, fine enough to tell an SPS-dominant tank apart from an ultra-low-nutrient system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComparator, not a colour chart\u003c\/strong\u003e — colour is matched inside a comparator against a printed reference card rather than eyeballed under tank lighting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDilution extends the range\u003c\/strong\u003e — diluting the sample with RO water per the instructions extends the usable range up to 64 ppm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefillable\u003c\/strong\u003e — the comparator is reusable and reagents are sold separately as refills.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTest count\u003c\/th\u003e\n\u003ctd\u003e100 tests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003ctd\u003eNitrate (NO3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDirect range\u003c\/th\u003e\n\u003ctd\u003e0.25-4 ppm NO3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExtended range\u003c\/th\u003e\n\u003ctd\u003eUp to 64 ppm with RO dilution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e0.125 ppm NO3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eColorimetric comparator, 3-reagent development\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTarget ranges\u003c\/h3\u003e\n\u003cp\u003eRed Sea's own published target bands, from its Nutrient Management Program. Red Sea doesn't break these down by community, planted or cichlid setups since this kit is saltwater only — marine fish-only is the closest published equivalent to a FOWLR target.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem type\u003c\/th\u003e\n\u003cth\u003eTarget NO3\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUltra-low nutrient system (ULNS)\u003c\/th\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPS-dominant reef\u003c\/th\u003e\n\u003ctd\u003e0.25-0.5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMixed reef \/ SPS frag tank\u003c\/th\u003e\n\u003ctd\u003e1-2 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMarine fish only (no corals)\u003c\/th\u003e\n\u003ctd\u003eUnder 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eColorimetric comparator with reference colour card\u003c\/li\u003e\n\u003cli\u003eReagent bottles A, B and C (100 tests)\u003c\/li\u003e\n\u003cli\u003eAnalytical-grade glass test vial and dosing syringe\u003c\/li\u003e\n\u003cli\u003eInstructions and storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eReagents are stable up to the expiry date printed on each bottle when stored closed at 15-25 degrees Celsius. Keep them in the case supplied, out of direct light, and reseal bottles promptly after use.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThe comparator hardware carries Red Sea's standard manufacturer warranty against faults, in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it. As a chemical kit for single use per test, it isn't covered for change-of-mind returns once opened.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests do I get from one kit?\u003c\/h4\u003e\n\u003cp\u003e100 tests. Reagent refills are sold separately so you can keep reusing the same comparator.\u003c\/p\u003e\n\u003ch4\u003eDo I need any other equipment to read the result?\u003c\/h4\u003e\n\u003cp\u003eNo. The kit is read by eye against the reference card inside the comparator, no photometer required.\u003c\/p\u003e\n\u003ch4\u003eCan I use this in a freshwater tank?\u003c\/h4\u003e\n\u003cp\u003eThis kit is formulated and rated for saltwater use. Red Sea doesn't publish specifications for freshwater use with this kit.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152266019,"sku":"RED253","price":90.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-nitrate-pro-testing-43876663132451.webp?v=1790239002"},{"product_id":"red-sea-nitrate-pro-reagent-refill-kit","title":"Red Sea Nitrate Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eThis is the reagent-only refill for the Red Sea Nitrate Pro Test Kit, restocking your comparator with fresh chemistry for another 100 tests.\u003c\/strong\u003e No need to buy a whole new kit just to keep testing.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea chemistry\u003c\/strong\u003e — same formulation as the original kit, so readings stay consistent with your test history.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests per refill\u003c\/strong\u003e — matches the full kit's count, without paying for the comparator again.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCadmium reduction method\u003c\/strong\u003e — the same lab-grade colorimetric process used in the full kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per refill\u003c\/th\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContents\u003c\/th\u003e\n\u003ctd\u003eReagent A, Reagent B, Reagent C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eNitrate (NO3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible with\u003c\/th\u003e\n\u003ctd\u003eRed Sea Nitrate Pro Test Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eRED253a\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e7290100774762\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cp\u003eThree reagent bottles — A, B and C — dosed to match the original Nitrate Pro protocol.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e comparator, colour disc, glass vial and syringe. Requires the original Nitrate Pro Test Kit hardware and is not a standalone test.\u003c\/p\u003e\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eKeep reagents in their original bottles, in a cool, dry, well-ventilated spot away from direct sunlight and temperature swings. Reagent A is corrosive and Reagent B can irritate skin, so keep both capped and out of reach of kids.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's standard warranty against manufacturing defects, in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it. Because the reagents are classified as dangerous goods for transport, they are shipped in their original, sealed bottles.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this include the comparator?\u003c\/h4\u003e\n\u003cp\u003eNo. You need your existing Nitrate Pro comparator, colour disc and vial to run the tests.\u003c\/p\u003e\n\u003ch4\u003eCan I use this with another brand's comparator?\u003c\/h4\u003e\n\u003cp\u003eNo. The reagents are dosed specifically for the Red Sea Nitrate Pro system.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152298787,"sku":"RED253a","price":61.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-nitrate-pro-reagent-43876663165219.webp?v=1790239002"},{"product_id":"red-sea-phosphate-pro-testing-kit-100-tests","title":"Red Sea Phosphate Pro Testing Kit 100 Tests","description":"\u003cp\u003e\u003cstrong\u003eMeasures phosphate down to the level that actually shapes coral colour.\u003c\/strong\u003e The Red Sea Phosphate Pro is a colour-comparator test kit built for reef aquariums, where the difference between a healthy SPS system and a nuisance-algae outbreak often sits inside a range most hobby test kits can't resolve. It reads 0–5 ppm PO4 to an accuracy of ±0.02 ppm, giving a result precise enough to guide dosing rather than just confirm phosphate is present.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–5 ppm range at ±0.02 ppm accuracy\u003c\/strong\u003e — resolves the low readings that matter in a reef tank, where many kits can't distinguish 0.05 ppm from 0.15 ppm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour comparator method\u003c\/strong\u003e — no digital meter to calibrate, no photometer needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests per kit\u003c\/strong\u003e — weekly testing for close to two years before a refill is needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReagent refill available\u003c\/strong\u003e — restock the chemistry without buying the comparator again\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart of the Red Sea Reef Care Program\u003c\/strong\u003e — designed to be read alongside Nitrate Pro results to guide biological nutrient reduction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003ctd\u003e0–5 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e±0.02 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eColour comparator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater (reef)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefill available\u003c\/th\u003e\n\u003ctd\u003eYes — Red Sea Phosphate Pro Reagent Refill Kit, 100 tests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eComparator block and viewer\u003c\/li\u003e\n\u003cli\u003eTest vials\u003c\/li\u003e\n\u003cli\u003eReagents for 100 tests\u003c\/li\u003e\n\u003cli\u003eInstructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReading the result\u003c\/h3\u003e\u003cp\u003eRed Sea's own nutrient management guidance gives different phosphate targets depending on what the system is aiming for, not one single correct number.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSystem type\u003c\/th\u003e\n\u003cth\u003eTarget PO4\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMixed reef \/ SPS frag tank\u003c\/td\u003e\n\u003ctd\u003e0.08–0.12 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPS-dominant system\u003c\/td\u003e\n\u003ctd\u003e0.01–0.02 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltra-low nutrient system (ULNS)\u003c\/td\u003e\n\u003ctd\u003e0 ppm (undetectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for saltwater and reef aquariums monitoring phosphate as part of a nutrient control or dosing routine\u003c\/li\u003e\n\u003cli\u003eNot suitable for freshwater test panels — the range and colour scale are calibrated to reef-tank chemistry\u003c\/li\u003e\n\u003cli\u003eNot a substitute for ICP testing where lab-grade trace-element precision is required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-phosphate-pro-reagent-refill-kit\"\u003eRed Sea Phosphate Pro Reagent Refill Kit\u003c\/a\u003e — restock the chemistry once the 100 tests are used\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-multi-test-kit\"\u003eRed Sea Marine Care Multi Test Kit\u003c\/a\u003e — for a broader saltwater parameter panel alongside phosphate\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eReagents carry a use-by date printed on the pack — check it before testing, since expired reagents give false readings. Consumer guarantees apply under Australian Consumer Law in addition to any manufacturer terms. Standard parcel delivery applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow many tests does this kit include?\u003c\/h4\u003e\u003cp\u003e100 tests. A weekly testing routine will run for close to two years before the reagents need restocking.\u003c\/p\u003e\u003ch4\u003eDo I need the full kit or the reagent refill?\u003c\/h4\u003e\u003cp\u003eBuy the full kit if this is your first Phosphate Pro test kit — you need the comparator and vials. If you already own a Phosphate Pro comparator and only need fresh chemistry, the reagent refill restores the same 100 tests at a lower cost.\u003c\/p\u003e\u003ch4\u003eCan I use this on a freshwater tank?\u003c\/h4\u003e\u003cp\u003eIt's built and calibrated for saltwater reef chemistry. A freshwater-specific phosphate test is a better fit for planted or community tanks.\u003c\/p\u003e\u003ch4\u003eWhat phosphate reading should I be aiming for?\u003c\/h4\u003e\u003cp\u003eIt depends on the system — see the target range table above. A mixed reef sits higher than an SPS-dominant or ultra-low-nutrient system.\u003c\/p\u003e\u003ch4\u003eWhy does my phosphate reading not match my nitrate reading?\u003c\/h4\u003e\u003cp\u003ePhosphate and nitrate don't always move together — test both, since Red Sea's nutrient control approach reads the two side by side rather than in isolation.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152331555,"sku":"RED254","price":90.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-phosphate-pro-testin-43876663197987.webp?v=1790239001"},{"product_id":"red-sea-phosphate-pro-reagent-refill-kit","title":"Red Sea Phosphate Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eRestock the chemistry, not the comparator.\u003c\/strong\u003e This is the genuine Red Sea reagent refill for the Phosphate Pro test kit — the same 0–5 ppm PO4 chemistry at ±0.02 ppm accuracy, without paying for a new comparator block and vials you already own.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests\u003c\/strong\u003e — restores the full test count of a Phosphate Pro kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame accuracy as the full kit\u003c\/strong\u003e — 0–5 ppm PO4 at ±0.02 ppm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh, in-date reagents\u003c\/strong\u003e — aged reagents drift and give false-low or false-high readings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower cost than a full kit\u003c\/strong\u003e — no comparator or vials included, because you don't need them again\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible with\u003c\/th\u003e\n\u003ctd\u003eRed Sea Phosphate Pro Testing Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per refill\u003c\/th\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003ctd\u003e0–5 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e±0.02 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater (reef)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eReagents for 100 tests\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThis refill does not include the comparator block or viewer — it restocks chemistry only.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for existing owners of the Red Sea Phosphate Pro comparator kit\u003c\/li\u003e\n\u003cli\u003eNot suitable as a standalone test kit — you need the original comparator to read results\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-phosphate-pro-testing-kit-100-tests\"\u003eRed Sea Phosphate Pro Testing Kit\u003c\/a\u003e — the full kit, if you don't already own the comparator\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eReagents carry a use-by date printed on the pack. Consumer guarantees apply under Australian Consumer Law in addition to any manufacturer terms. Standard parcel delivery applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWill this work with my existing Phosphate Pro kit?\u003c\/h4\u003e\u003cp\u003eYes — it's the genuine Red Sea refill and restores the same 100-test chemistry the full kit ships with.\u003c\/p\u003e\u003ch4\u003eDoes this include a new comparator?\u003c\/h4\u003e\u003cp\u003eNo. It's reagents only. Keep using your existing comparator block and viewer.\u003c\/p\u003e\u003ch4\u003eHow do I know when to reorder?\u003c\/h4\u003e\u003cp\u003eCheck the use-by date on the reagents and reorder before it passes — expired reagents give unreliable readings.\u003c\/p\u003e\u003ch4\u003eIs this the same chemistry as a brand-new kit?\u003c\/h4\u003e\u003cp\u003eYes — same 0–5 ppm range and ±0.02 ppm accuracy as the full Phosphate Pro kit.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152364323,"sku":"RED254a","price":61.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-phosphate-pro-reagen-46119440384291.webp?v=1790239002"},{"product_id":"red-sea-potassium-pro-reagent-refill-kit","title":"Red Sea Potassium Pro Reagent Refill Kit","description":"\u003cp\u003e\u003cstrong\u003eRestock the chemistry, not the titrator.\u003c\/strong\u003e This is the genuine Red Sea reagent refill for the Potassium Pro test kit — the same 150–450 ppm titration chemistry, without paying for a new titrator you already own.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 tests\u003c\/strong\u003e — restores the full test count of a Potassium Pro kit\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSame 150–450 ppm range and titration method as the full kit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh, in-date reagents\u003c\/strong\u003e — aged reagents give an unreliable titration endpoint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower cost than a full kit\u003c\/strong\u003e — no titrator included, because you don't need it again\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible with\u003c\/th\u003e\n\u003ctd\u003eRed Sea Potassium Pro Test Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per refill\u003c\/th\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003ctd\u003e150–450 ppm K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater (reef)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eReagents A, B and C, plus titrant, for 40 tests\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eThis refill does not include the titrator or test vial — it restocks chemistry only.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for existing owners of the Red Sea Potassium Pro titrator\u003c\/li\u003e\n\u003cli\u003eNot suitable as a standalone test kit — you need the original titrator to run a test\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-potassium-pro-test-kit\"\u003eRed Sea Potassium Pro Test Kit\u003c\/a\u003e — the full kit, if you don't already own the titrator\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eReagents carry a use-by date printed on the pack. Consumer guarantees apply under Australian Consumer Law in addition to any manufacturer terms. Standard parcel delivery applies.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWill this work with my existing Potassium Pro kit?\u003c\/h4\u003e\u003cp\u003eYes — it's the genuine Red Sea refill and restores the same 40-test chemistry the full kit ships with.\u003c\/p\u003e\u003ch4\u003eDoes this include a new titrator?\u003c\/h4\u003e\u003cp\u003eNo. It's reagents only. Keep using your existing titrator and vial.\u003c\/p\u003e\u003ch4\u003eHow do I know when to reorder?\u003c\/h4\u003e\u003cp\u003eCheck the use-by date on the reagents and reorder before it passes.\u003c\/p\u003e\u003ch4\u003eIs this the same chemistry as a brand-new kit?\u003c\/h4\u003e\u003cp\u003eYes — same 150–450 ppm range and titration method as the full Potassium Pro kit.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152429859,"sku":"RED256a","price":88.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-potassium-pro-reagen-46119441105187.webp?v=1790239001"},{"product_id":"red-sea-reef-foundation-pro-multi-testing-kit","title":"Red Sea Reef Foundation Pro Multi Testing Kit","description":"\u003cp\u003e\u003cstrong\u003eThree tests corals actually run out of, in one titration kit.\u003c\/strong\u003e The Red Sea Reef Foundation Pro Multi Test Kit measures calcium, alkalinity (KH) and magnesium — the three elements stony corals consume fastest as they build skeleton — using the same titration method reef keepers trust for lab-grade accuracy. It replaces three separate single-parameter kits with one box and one titrator.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree tests, one kit\u003c\/strong\u003e — calcium, alkalinity and magnesium in a single titration-based kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 tests per parameter\u003c\/strong\u003e — 225 individual readings across the three elements before reagents run out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration accuracy\u003c\/strong\u003e — a colour-change endpoint read against a graduated titrator, rather than a colour-matched strip or card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividually refillable\u003c\/strong\u003e — Red Sea sells single-parameter reagent refills, so a heavily used parameter doesn't force replacing the whole kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart of the Reef Care testing range\u003c\/strong\u003e — designed to pair with Red Sea's Foundation A\/B\/C dosing elements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003cth\u003eTests included\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalcium (Ca)\u003c\/td\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e±2.5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlkalinity (KH)\u003c\/td\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e±0.025 meq\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e±10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eSKU RED257, barcode 7290100772102. The kit includes analytical-grade glass vials and a high-precision titrator; each parameter has an effectively unlimited range read off the titrator scale rather than a fixed card range.\u003c\/p\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003cp\u003eCalcium, alkalinity and magnesium are reef-keeping parameters — this kit is built for marine reef systems rather than freshwater, so the ranges below are the ones that matter for it:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eTypical mixed reef\u003c\/th\u003e\n\u003cth\u003eSPS-focused \/ high-growth\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalcium\u003c\/td\u003e\n\u003ctd\u003e380–450 ppm\u003c\/td\u003e\n\u003ctd\u003e420–450 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlkalinity\u003c\/td\u003e\n\u003ctd\u003e7–12 dKH\u003c\/td\u003e\n\u003ctd\u003e7–9 dKH, held stable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnesium\u003c\/td\u003e\n\u003ctd\u003e1,250–1,350 ppm\u003c\/td\u003e\n\u003ctd\u003e1,300–1,350 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eConsistency matters more than hitting an exact number — corals tolerate a range far better than they tolerate a parameter swinging inside it.\u003c\/p\u003e\u003ch3\u003eWhat to do when a reading is out of range\u003c\/h3\u003e\u003cp\u003eBecause calcium, alkalinity and magnesium are consumed together as corals build skeleton, a low reading on one is often a sign to check the others rather than dose that one element in isolation. Red Sea's Foundation A (calcium\/strontium), Foundation B (alkalinity) and Foundation C (magnesium) supplements are formulated to correct each parameter without pulling the others out of balance when dosed to this kit's readings.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eReagents have a shelf life — check the use-by date before relying on a result that looks unusual, and replace reagents rather than stretching them past date. Rinse titration vials between tests to avoid cross-contaminating readings.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees available under Australian Consumer Law. Reagents are a standard parcel item with no special freight handling.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-energy-plus\"\u003eRed Sea Reef Energy Plus\u003c\/a\u003e — feeding drives coral growth, and growth is what consumes the calcium, alkalinity and magnesium this kit tracks.\u003c\/li\u003e\n\u003cli\u003eRed Sea Foundation A, B and C elements, to correct whichever of the three readings comes back low.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow many tests do I actually get?\u003c\/h4\u003e\u003cp\u003e75 tests for each of calcium, alkalinity and magnesium — 225 individual readings in total, run from the one kit.\u003c\/p\u003e\u003ch4\u003eIs this kit for freshwater or marine tanks?\u003c\/h4\u003e\u003cp\u003eMarine reef systems. Calcium, alkalinity and magnesium at reef concentrations aren't parameters freshwater or FOWLR-only tanks need to track in the same way.\u003c\/p\u003e\u003ch4\u003eDo I need to test all three every time?\u003c\/h4\u003e\u003cp\u003eThey move together, so testing only one can hide a problem in another. Most reef keepers run all three on the same day, weekly on a stable tank or more often while dialling in a new dosing regime.\u003c\/p\u003e\u003ch4\u003eWhat's the difference between this and single-parameter kits?\u003c\/h4\u003e\u003cp\u003eSame titration method and accuracy — this kit just bundles the three tests corals draw on together into one box, with one titrator instead of three.\u003c\/p\u003e\u003ch4\u003eCan I buy refills instead of a whole new kit?\u003c\/h4\u003e\u003cp\u003eYes. Red Sea sells single-parameter reagent refills for calcium, alkalinity and magnesium separately, so a parameter you test more often doesn't force replacing the full kit early.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152495395,"sku":"RED257","price":122.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reef-foundation-pro-43876663591203.webp?v=1790239001"},{"product_id":"red-sea-reef-colours-pro-multi-testing-kit","title":"Red Sea Reef Colours Pro Multi Testing Kit","description":"\u003cp\u003e\u003cstrong\u003eThe three colour elements, tested in one kit before you dose.\u003c\/strong\u003e The Red Sea Reef Colours Pro Multi Test Kit measures iodine, potassium and iron — the trace elements behind Red Sea's Trace-Colors coral colouration program. Trace elements have a narrower safe range than calcium or magnesium, so Red Sea's own guidance is to test before every dose rather than follow a fixed schedule. This kit is what makes that possible without buying three separate test kits.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree parameters, one kit\u003c\/strong\u003e — iodine, potassium and iron, each with its own dedicated test method.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorimetric and titration methods\u003c\/strong\u003e — iodine and iron are read by colour comparator, potassium by titration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs directly with dosing\u003c\/strong\u003e — each result maps to a specific Trace-Colors supplement (A for iodine, B for potassium, C for iron).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40 to 50 tests per parameter\u003c\/strong\u003e — potassium's titration reagent is the limiting factor at 40 full tests; see Specifications for the breakdown.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eNumber of tests\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIodine (I2)\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e0–0.09 ppm\u003c\/td\u003e\n\u003ctd\u003e±0.03 ppm\u003c\/td\u003e\n\u003ctd\u003eColorimetric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotassium (K)\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e150–450 ppm\u003c\/td\u003e\n\u003ctd\u003e±12 ppm\u003c\/td\u003e\n\u003ctd\u003eTitration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIron (Fe)\u003c\/td\u003e\n\u003ctd\u003e45\u003c\/td\u003e\n\u003ctd\u003e0–0.09 ppm\u003c\/td\u003e\n\u003ctd\u003e±0.05 ppm\u003c\/td\u003e\n\u003ctd\u003eColorimetric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat to do when a reading is out of range\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eReading\u003c\/th\u003e\n\u003cth\u003eCorrect with\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIodine low\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-reef-care-iodine-trace-colours-a\"\u003eRed Sea Reef Care Iodine+ Trace Colours A\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotassium low\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-reef-care-potassium-trace-coral-b\"\u003eRed Sea Reef Care Potassium+ Trace Coral B\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIron low\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-reef-care-iron-trace-colours-c\"\u003eRed Sea Reef Care Iron+ Trace Colours C\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef aquariums running or considering the Trace-Colors A\/B\/C\/D coral colouration program, and anyone wanting to confirm trace element levels before dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums, or as a general water quality kit — it doesn't test calcium, alkalinity, magnesium, ammonia, nitrite or nitrate. Pair it with the Reef Foundation Pro kit for those.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eStore reagents away from direct sunlight at room temperature, and keep bottle caps tightly closed between uses to prevent contamination. Check the use-by date printed on each reagent bottle before testing, and replace individual reagents as they run out rather than the whole kit.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-potassium-trace-coral-b\"\u003eRed Sea Reef Care Potassium+ Trace Coral B\u003c\/a\u003e — corrects a low potassium reading from this kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-iodine-trace-colours-a\"\u003eRed Sea Reef Care Iodine+ Trace Colours A\u003c\/a\u003e — corrects a low iodine reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eRed Sea Reef Foundation Pro Multi Testing Kit\u003c\/a\u003e — tests calcium, alkalinity and magnesium alongside this kit's trace elements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by Red Sea's standard consumer guarantee in addition to your rights under Australian Consumer Law. Ships standard courier — no cold chain or special handling required.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhy does the kit list a different number of tests for each parameter?\u003c\/h4\u003e\u003cp\u003eEach parameter uses its own reagent, consumed at a different rate per test. Potassium's titration method uses more reagent per test than the colorimetric methods for iodine and iron, so its 40-test count is the practical limit on how many full three-parameter cycles the kit supports.\u003c\/p\u003e\u003ch4\u003eDo I need this kit if I only dose one Trace-Colors element?\u003c\/h4\u003e\u003cp\u003eYou only need to test the elements you're dosing. If you're running the full four-part Trace-Colors program (A, B, C and D), this kit covers the three that have direct tests — iodine, potassium and iron.\u003c\/p\u003e\u003ch4\u003eCan I buy replacement reagents instead of a new kit?\u003c\/h4\u003e\u003cp\u003eYes — individual reagent refills are available so you don't need to replace the comparator or titration equipment once a single reagent runs out.\u003c\/p\u003e\u003ch4\u003eHow is this different from the Reef Foundation Pro kit?\u003c\/h4\u003e\u003cp\u003eReef Colours Pro tests the trace colour elements — iodine, potassium and iron. Reef Foundation Pro tests the major skeletal elements — calcium, alkalinity and magnesium. Most reef keepers running a full dosing program use both.\u003c\/p\u003e\u003ch4\u003eIs titration harder to use than a colour comparator?\u003c\/h4\u003e\u003cp\u003eIt takes a little more care — you're counting drops to a colour-change endpoint rather than matching a colour card — but it's the standard method for measuring potassium accurately at reef-relevant concentrations.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152560931,"sku":"RED258","price":159.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reef-colours-pro-mul-43876663623971.webp?v=1790239002"},{"product_id":"red-sea-nutrients-control-multi-test-kit-no3-po4","title":"Red Sea Nutrients Control Multi Test Kit (NO3\/PO4)","description":"\u003cp\u003e\u003cstrong\u003eBoth nutrient numbers in one kit, at reef-tank resolution.\u003c\/strong\u003e The Red Sea Nutrients Control Multi Test Kit measures nitrate and phosphate together — the pair that between them decide coral colour, growth, and whether nuisance algae gets a foothold. It's a colorimetric comparator kit: dose the reagents, match the colour against the printed reference card, and read the result. No titration, no meter to calibrate.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTests nitrate and phosphate in one box\u003c\/strong\u003e — 100 tests for each parameter, so you're not buying and tracking two separate kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReef-relevant range\u003c\/strong\u003e — nitrate 0–64 ppm and phosphate 0–5 ppm, covering everything from a heavily stocked fish-only tank down to a low-nutrient reef.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine enough resolution for reef dosing decisions\u003c\/strong\u003e — nitrate to 0.125 ppm, phosphate to 0.02 ppm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComparator format\u003c\/strong\u003e — no titration technique to learn, no drop-counting errors; read the colour against the card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for Red Sea's Reef Care Program\u003c\/strong\u003e — the same nitrate and phosphate numbers this kit reads are what the NO3:PO4-X dosing chart is based on.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eRed Sea Nutrients Control Multi Test Kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eRED259\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests included\u003c\/td\u003e\n\u003ctd\u003e100 nitrate tests, 100 phosphate tests\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate range\u003c\/td\u003e\n\u003ctd\u003e0–64 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate resolution\u003c\/td\u003e\n\u003ctd\u003e0.125 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhosphate range\u003c\/td\u003e\n\u003ctd\u003e0–5 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhosphate resolution\u003c\/td\u003e\n\u003ctd\u003e0.02 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eColorimetric comparator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eMarine \/ reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for marine and reef aquarists tracking nitrate and phosphate as part of a nutrient control or algae management routine.\u003c\/li\u003e\n\u003cli\u003eSuitable as the weekly check while dosing \u003ca href=\"\/products\/red-sea-no3-po4-x-1l\"\u003eRed Sea NO3:PO4-X\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eNot a substitute for a digital nitrate\/phosphate monitor where continuous logging is needed — this is a manual, on-demand test.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eStore the kit closed, away from direct light and extremes of temperature, and check reagents haven't passed their use-by date before a critical test. Rinse test vials thoroughly between uses so residue from one test doesn't skew the next.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-no3-po4-x-1l\"\u003eRed Sea NO3:PO4-X 1 L\u003c\/a\u003e — the nitrate and phosphate reducer this kit's readings are used to dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-phosphate-pro-testing-kit-100-tests\"\u003eRed Sea Phosphate Pro Testing Kit\u003c\/a\u003e — a higher-resolution titration option if you need finer phosphate readings than the comparator format gives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eBacked by Red Sea's standard product warranty, in addition to your rights under Australian Consumer Law. Ships as a standard parcel.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat's the difference between this and Red Sea's Pro test kits?\u003c\/h4\u003e\n\u003cp\u003eThis kit uses a colorimetric comparator — you match a colour against a printed card. Red Sea's Pro range (sold separately) uses titration for finer resolution. The comparator format here is faster and simpler for routine weekly checks.\u003c\/p\u003e\n\u003ch4\u003eHow many tests does the kit actually include?\u003c\/h4\u003e\n\u003cp\u003e100 nitrate tests and 100 phosphate tests — enough for roughly two years of weekly testing on both parameters.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit to set my NO3:PO4-X dosing rate?\u003c\/h4\u003e\n\u003cp\u003eYes — Red Sea's NO3:PO4-X dosing chart is keyed to nitrate and phosphate readings in exactly the ranges this kit measures.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit work for freshwater tanks?\u003c\/h4\u003e\n\u003cp\u003eIt's formulated and ranged for marine and reef use. A freshwater-specific nitrate or phosphate kit will give more usable resolution at freshwater's typically lower target levels.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774152593699,"sku":"RED259","price":128.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-nutrients-control-mu-43876663656739.webp?v=1790239002"},{"product_id":"red-sea-marine-care-calcium-test-kit","title":"Red Sea Marine Care Calcium Test Kit","description":"\u003cp\u003e\u003cstrong\u003eKnow your calcium before you dose blind.\u003c\/strong\u003e The Red Sea Marine Care Calcium Test Kit measures calcium in marine and reef aquariums using a syringe-based titration — count the drops, read the number straight off the syringe, no colour matching to squint at. Calcium is the number one building block for coral and coralline growth, and it drops fastest in the tanks doing the most growing.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 titration tests per kit\u003c\/strong\u003e — enough for weekly testing in a busy reef tank for well over a year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable resolution\u003c\/strong\u003e — read to 30 ppm for a quick weekly check, or 15 ppm when you need to confirm a dosing change actually moved the number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration method\u003c\/strong\u003e — a 5 mL syringe doses reagent drop by drop until the sample changes colour; the drop count is the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion chart included\u003c\/strong\u003e — the drop count reads straight across to ppm without doing the maths yourself.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasures\u003c\/td\u003e\n\u003ctd\u003eCalcium (Ca)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eTitration (syringe drop-count)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003eSelectable 15 ppm or 30 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests per kit\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eSealed, 15–25°C, use before the expiry date printed on the pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\u003cp\u003eThe kit includes Reagent A (25 mL), Reagent B (20 g), Reagent C (50 mL), a 5 mL syringe, a glass test vial, a measuring spoon and printed instructions with a conversion chart — everything needed for 75 tests. It does not include a magnesium or alkalinity test — calcium, alkalinity and magnesium move together in a reef tank, and testing only one gives an incomplete picture.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for fish-only, mixed reef and SPS-dominated marine systems — anywhere coralline algae, corals or clams are drawing calcium out of the water. Less useful on a fish-only tank with no calcifying life, where calcium rarely needs tracking.\u003c\/p\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSystem type\u003c\/th\u003e\n\u003cth\u003eTarget calcium\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFOWLR (fish only with live rock)\u003c\/td\u003e\n\u003ctd\u003e380–420 mg\/L — stability matters more than hitting a specific number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMixed reef \/ soft and LPS coral\u003c\/td\u003e\n\u003ctd\u003e400–450 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPS-dominated reef\u003c\/td\u003e\n\u003ctd\u003e420–450 mg\/L, held alongside alkalinity 7–9 dKH and magnesium 1,300–1,400 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese are marine and reef target ranges. Calcium is not a parameter tracked in freshwater community, planted or African cichlid tanks, so no freshwater target range applies to this kit.\u003c\/p\u003e\u003ch3\u003eWhat to do when the reading is out of range\u003c\/h3\u003e\u003cp\u003eLow calcium is corrected with a calcium supplement such as \u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Reef Care Calcium+ Foundation A\u003c\/a\u003e, dosed alongside alkalinity and magnesium rather than on its own — moving one element without the others throws off the balance between them. Retest a few days after any dosing change rather than the same day; calcium takes time to equilibrate.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eKeep sealed, store between 15–25°C out of direct sun, and check the expiry date printed on the pack before trusting an older kit's result.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees under Australian Consumer Law, in addition to any manufacturer undertaking. Standard parcel freight — no special handling required.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Testing Kit\u003c\/a\u003e — test alongside calcium; the two parameters move together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-magnesium-test-kit\"\u003eRed Sea Marine Care Magnesium Test Kit\u003c\/a\u003e — magnesium stabilises both calcium and alkalinity.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-calcium-foundation-a\"\u003eRed Sea Reef Care Calcium+ Foundation A\u003c\/a\u003e — the matching dosing solution when calcium reads low.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow often should I test calcium?\u003c\/h4\u003e\u003cp\u003eWeekly in a growing reef tank, fortnightly to monthly in a stable fish-only or soft-coral system.\u003c\/p\u003e\u003ch4\u003eWhy does my calcium keep dropping?\u003c\/h4\u003e\u003cp\u003eGrowing coral and coralline algae consume calcium continuously — the more growth in the tank, the faster it needs replacing.\u003c\/p\u003e\u003ch4\u003eShould I test calcium on its own, or with alkalinity and magnesium?\u003c\/h4\u003e\u003cp\u003eTest all three together where possible. Calcium and alkalinity are inversely linked through the calcification process, and magnesium keeps both in solution — a change in one without checking the others can send you chasing the wrong number.\u003c\/p\u003e\u003ch4\u003eCan I use this kit on a freshwater planted tank?\u003c\/h4\u003e\u003cp\u003eIt's formulated and calibrated for marine calcium ranges (350–500+ mg\/L) and isn't the right tool for the much lower calcium levels relevant to freshwater planted tanks.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774153740579,"sku":"RED295","price":40.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-calcium-46119451394339.webp?v=1790239001"},{"product_id":"red-sea-marine-care-phosphate-test-kit","title":"Red Sea Marine Care Phosphate Test Kit","description":"\u003cp\u003e\u003cstrong\u003eCatch phosphate before it becomes algae.\u003c\/strong\u003e The Red Sea Marine Care Phosphate Test Kit measures PO4 in marine and reef aquariums to 0.1 ppm resolution — the nutrient that feeds nuisance algae long before it's visible on the glass.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests per kit\u003c\/strong\u003e — enough for close to two years of weekly testing on one system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.1 ppm resolution\u003c\/strong\u003e — fine enough to catch phosphate creeping up before algae does.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDilution step extends the range\u003c\/strong\u003e — readings above 1 ppm are diluted and multiplied, covering roughly up to 17 ppm without a separate high-range kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour-card comparison\u003c\/strong\u003e — no equipment beyond the kit itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinks directly to Red Sea's algae-control dosing\u003c\/strong\u003e — the reading tells you how hard to dose, not just that there's a problem.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests per kit\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirect range\u003c\/td\u003e\n\u003ctd\u003e0.1 – 1 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtended range (with dilution)\u003c\/td\u003e\n\u003ctd\u003eup to approx. 17 ppm PO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to result\u003c\/td\u003e\n\u003ctd\u003eapprox. 8 minutes (6 minutes colour development, 2 minutes comparison)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eColorimetric, comparison card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich Red Sea phosphate kit do I need?\u003c\/h3\u003e\u003cp\u003eThis kit covers the range most marine and reef tanks actually sit in. If you're running an ultra-low-nutrient reef and need to resolve readings well under 0.1 ppm, Red Sea's Phosphate Pro kit is built for that finer end — most tanks with any visible nuisance algae don't need it yet.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e marine and reef aquariums.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e Red Sea markets this kit for marine use — it is not intended for freshwater testing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat to do with the result\u003c\/h3\u003e\u003cp\u003eA rising phosphate reading is your earliest warning of a nutrient problem — well before algae shows up on the glass or rock. Red Sea's guidance pairs phosphate testing with nitrate testing and ties elevated readings to dosing NO3:PO4-X, its biological nitrate and phosphate reducer.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eReagents are stable up to the date printed on the pack when stored closed between 15°C and 25°C, out of direct sun.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the manufacturer's standard warranty against defects, in addition to your rights under Australian Consumer Law. Standard shipping across Australia.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow often should I test phosphate?\u003c\/h4\u003e\u003cp\u003eWeekly is the usual routine on an established reef, and more often if you're actively dosing a phosphate reducer and want to track the trend.\u003c\/p\u003e\u003ch4\u003eDoes this kit include a calibration solution?\u003c\/h4\u003e\u003cp\u003eNo — the kit is a reagent-and-comparison-card test, not a calibrated meter, so no separate reference standard is included.\u003c\/p\u003e\u003ch4\u003eMy reading is off the chart — what do I do?\u003c\/h4\u003e\u003cp\u003eUse the kit's dilution step: dilute the sample as directed, retest, and multiply the result by the dilution factor to get the true reading.\u003c\/p\u003e\u003ch4\u003eWill phosphate testing tell me why I have algae?\u003c\/h4\u003e\u003cp\u003eIt tells you whether nutrient level is a likely driver. Algae can also be light- or flow-related, so a normal phosphate reading doesn't rule out every cause — but an elevated one is usually the first thing to fix.\u003c\/p\u003e\u003ch4\u003eCan I use this on a freshwater tank?\u003c\/h4\u003e\u003cp\u003eRed Sea markets this kit for marine use. It is not intended for freshwater testing.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774153773347,"sku":"RED296","price":51.5,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-phosphat-46119451459875.webp?v=1790239005"},{"product_id":"red-sea-marine-care-ph-alk-test-100-55-tests","title":"Red Sea Marine Care pH\/Alk Test 100\/55 Tests","description":"\u003cp\u003e\u003cstrong\u003eTest the pair that actually explains your marine water chemistry.\u003c\/strong\u003e The Red Sea Marine Care pH\/Alkalinity Test Kit measures pH (100 tests) and alkalinity\/KH (55 tests) in marine and reef aquariums — two parameters that move together, since a weak alkalinity buffer is the most common cause of a swinging pH.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo linked parameters in one kit\u003c\/strong\u003e — pH and alkalinity share the same causes and the same fixes, so testing them together tells you more than either alone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 pH tests, 55 alkalinity tests\u003c\/strong\u003e — enough for months of weekly testing on a single system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorimetric pH, titration-based alkalinity\u003c\/strong\u003e — pH develops colour in around 10 seconds and stays stable to read for 5 minutes; alkalinity is read by counting reagent drops to a colour-change endpoint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComparison cards included\u003c\/strong\u003e — no separate colour chart to lose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEntry point into Red Sea's Reef Care Program\u003c\/strong\u003e — results line up with the dosing guidance for Red Sea's Reef Foundation supplements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eResolution \/ accuracy\u003c\/th\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e7.6 – 8.6\u003c\/td\u003e\n\u003ctd\u003e±0.2\u003c\/td\u003e\n\u003ctd\u003eColorimetric (liquid indicator + comparison card)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlkalinity (KH)\u003c\/td\u003e\n\u003ctd\u003e55\u003c\/td\u003e\n\u003ctd\u003e0 dKH and up\u003c\/td\u003e\n\u003ctd\u003e1 °dKH \/ 0.36 meq\/L (0.5 °dKH resolution using the 10 mL sample volume)\u003c\/td\u003e\n\u003ctd\u003eDrop-count titration to colour-change endpoint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich Red Sea test kit do I need?\u003c\/h3\u003e\u003cp\u003eThis is the everyday tier of Red Sea's pH\/alkalinity testing. If you're chasing tighter reef-tank precision — dosing a calcium reactor or a two-part system where a swing of a few hundredths matters — Red Sea's KH\/Alkalinity Pro Test Kit uses a finer titration for higher resolution. For routine weekly monitoring on a fish-only or mixed reef system, this kit is the right level of precision.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e marine and reef aquariums, fish-only and mixed reef systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums — Red Sea markets this kit specifically for marine use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat to do with the result\u003c\/h3\u003e\u003cp\u003eIf alkalinity comes back low, Red Sea's own guidance ties this kit's results to its Foundation supplement range — Reef Foundation B for mixed reef systems, or KH-Coralline Gro in fish-only marine systems — dosed against the reading you get here. Stable alkalinity is what holds pH steady, so it's worth correcting alkalinity before adjusting pH directly.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eReagents are stable up to the date printed on the pack when stored closed between 15°C and 25°C. Keep the kit out of direct sun and away from the tank splash zone — reagent bottles that pick up tank water give false readings.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the manufacturer's standard warranty against defects, in addition to your rights under Australian Consumer Law. Standard shipping across Australia.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow often should I test pH and alkalinity?\u003c\/h4\u003e\u003cp\u003eWeekly on an established reef tank, and more often — every day or two — after a water change, a new coral addition, or any dosing change.\u003c\/p\u003e\u003ch4\u003eDoes this kit include calibration or reference solutions?\u003c\/h4\u003e\u003cp\u003eNo. The kit contains the pH indicator, alkalinity reagent, a sample vial, a syringe and two comparison cards — no separate calibration standard is included.\u003c\/p\u003e\u003ch4\u003eWhy does my alkalinity reading keep drifting even though I dose consistently?\u003c\/h4\u003e\u003cp\u003eCoral growth and calcification consume alkalinity continuously, so a stable dose doesn't always mean a stable reading — increasing bioload usually means increasing demand. Retest after any change in stocking or growth rate.\u003c\/p\u003e\u003ch4\u003eCan I use this kit on a freshwater tank?\u003c\/h4\u003e\u003cp\u003eRed Sea markets this kit for marine and reef use. It is not intended for freshwater testing.\u003c\/p\u003e\u003ch4\u003eWhat's the difference between this kit and the Pro version?\u003c\/h4\u003e\u003cp\u003eBoth measure the same parameters. The Pro kit uses a finer titration step for higher resolution, aimed at reef keepers chasing tighter precision — this standard kit is accurate enough for regular monitoring on most systems.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774154363171,"sku":"RED310","price":41.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-ph-alk-t-43876673257763.webp?v=1790239002"},{"product_id":"red-sea-marine-care-ammonia-test-100-tests","title":"Red Sea Marine Care Ammonia Test 100 Tests","description":"\u003cp\u003e\u003cstrong\u003eCatch ammonia before it hurts anything.\u003c\/strong\u003e The Red Sea Marine Care Ammonia Test Kit measures total ammonia (NH3\/NH4) in marine and reef aquariums across a 0–2 ppm range in 0.2 ppm steps, using a colorimetric reaction read against a printed colour card. It's the test every cycling tank and every quarantine system needs on hand, and the one to reach for the moment something in an established tank smells wrong.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–2 ppm range in 0.2 ppm steps\u003c\/strong\u003e — fine enough to catch a cycling tank turning the corner, or a trace reading in a system that should read zero.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 tests per kit\u003c\/strong\u003e — enough for daily testing through a full 21-day cycle, with plenty spare for ongoing checks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorimetric method\u003c\/strong\u003e — add reagent, wait for the colour to stabilise, match against the card. No titration, no counting drops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe to run on any tank\u003c\/strong\u003e — the test is performed on a sample, not in the display, so it adds nothing to the water itself.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasures\u003c\/td\u003e\n\u003ctd\u003eTotal ammonia (NH3\/NH4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003e0–2 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e0.2 ppm per colour step\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eColorimetric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests per kit\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to result\u003c\/td\u003e\n\u003ctd\u003eApprox. 15 minutes for colour to stabilise\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eSealed, 15–25°C, use before the expiry date printed on the pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\u003cp\u003eThe kit includes ammonia reagent, a glass test vial and a printed colour comparison card, enough for 100 tests. It does not include a syringe — this is a direct colour-match test, not a titration — and it does not test any other parameter. Nitrite, nitrate and pH are separate kits, or covered together in the \u003ca href=\"\/products\/red-sea-marine-care-multi-test-kit\"\u003eMarine Care Multi Test Kit\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any marine or reef aquarium, and for freshwater tanks during cycling too — total ammonia toxicity behaves the same regardless of salinity, though this kit is formulated and sold as part of Red Sea's marine range. Not a substitute for a continuous ammonia alert or probe where livestock can't tolerate a delay between test and result — for fragile or newly stocked systems, test daily rather than relying on a single weekly check.\u003c\/p\u003e\u003ch3\u003eReading the result\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReading\u003c\/th\u003e\n\u003cth\u003eWhat it means\u003c\/th\u003e\n\u003cth\u003eWhat to do\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eNormal for an established, fully cycled tank\u003c\/td\u003e\n\u003ctd\u003eNo action — retest weekly, or daily during any change\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAny detectable reading in an established tank\u003c\/td\u003e\n\u003ctd\u003eSomething has disturbed the biofilter, or bioload\/feeding has outpaced it\u003c\/td\u003e\n\u003ctd\u003eImmediate partial water change, check filtration is running, reduce feeding, retest daily until it returns to zero\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFalling but still present, in a new tank\u003c\/td\u003e\n\u003ctd\u003eCycling is progressing — ammonia is being converted to nitrite\u003c\/td\u003e\n\u003ctd\u003eKeep testing daily; hold off stocking until ammonia and nitrite both read zero\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eKeep the kit sealed and store it between 15–25°C out of direct sun. Reagent is stable up to the expiry date printed on the pack — check the date before relying on a result from an older kit, since degraded reagent can give a false reading.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees under Australian Consumer Law, in addition to any manufacturer undertaking. Standard parcel freight — no special handling required.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-multi-test-kit\"\u003eRed Sea Marine Care Multi Test Kit\u003c\/a\u003e — for pH, nitrite and nitrate alongside ammonia in one box.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-nitrite-nitrate-test-60-100-tests\"\u003eRed Sea Marine Care Nitrite\/Nitrate Test Kit\u003c\/a\u003e — the next test to run once ammonia starts falling during cycling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhy does ammonia matter more than nitrite or nitrate?\u003c\/h4\u003e\u003cp\u003eAmmonia is the most immediately toxic of the three nitrogen compounds — even a low reading can stress or kill livestock in an established tank, where nitrite and nitrate build up more slowly and give more warning.\u003c\/p\u003e\u003ch4\u003eDoes this kit test free ammonia or total ammonia?\u003c\/h4\u003e\u003cp\u003eIt measures total ammonia (NH3 plus NH4). At normal marine pH, more of that total sits as the more toxic NH3 form than it would in a lower-pH freshwater tank, which is why any reading above zero in an established marine system is worth acting on straight away.\u003c\/p\u003e\u003ch4\u003eHow often should I test during cycling?\u003c\/h4\u003e\u003cp\u003eDaily. Ammonia and nitrite both need to read zero on the same day before the tank is considered cycled.\u003c\/p\u003e\u003ch4\u003eCan I use this on a freshwater tank?\u003c\/h4\u003e\u003cp\u003eYes — the chemistry is the same. It's sold as part of Red Sea's marine range, but works on any aquarium.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774154395939,"sku":"RED311","price":41.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-ammonia--10135201087779-1-dq.webp?v=1790372842"},{"product_id":"red-sea-marine-care-nitrite-nitrate-test-60-100-tests","title":"Red Sea Marine Care Nitrite\/Nitrate Test 60\/100 tests","description":"\u003cp\u003e\u003cstrong\u003eConfirm the cycle, then watch the creep.\u003c\/strong\u003e The Red Sea Marine Care Nitrite\/Nitrate Test Kit measures nitrite and nitrate in marine and reef aquariums — nitrite to confirm a new tank's cycle has finished, nitrate to track the slow build-up every established marine system eventually has to manage.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo parameters, one box\u003c\/strong\u003e — nitrite (60 tests) and nitrate (100 tests).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–1 ppm nitrite range in 0.05 ppm steps\u003c\/strong\u003e — fine enough to confirm a true zero, not just \"close to zero\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–250 ppm nitrate range in 2 ppm steps\u003c\/strong\u003e — covers everything from a pristine reef tank to a badly overdue water change.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorimetric method\u003c\/strong\u003e — add reagent, wait, match against the printed colour card.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite (NO2)\u003c\/td\u003e\n\u003ctd\u003e0–1 ppm\u003c\/td\u003e\n\u003ctd\u003e0.05 ppm\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate (NO3)\u003c\/td\u003e\n\u003ctd\u003e0–250 ppm\u003c\/td\u003e\n\u003ctd\u003e2 ppm\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eMethod: colorimetric for both. Water type: marine and reef. Storage: sealed, 15–25°C, use before the expiry date printed on the pack.\u003c\/p\u003e\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\u003cp\u003eThe kit includes nitrite and nitrate reagents, a glass test vial and printed colour comparison cards for both parameters. It does not include an ammonia, pH, calcium, magnesium or alkalinity test — for the full four-parameter cycling picture, see the \u003ca href=\"\/products\/red-sea-marine-care-multi-test-kit\"\u003eMarine Care Multi Test Kit\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any marine or reef aquarium — confirming cycling in a new tank, and tracking nutrient creep in an established one. On its own it's not a complete cycling test, since it doesn't cover ammonia; pair it with an \u003ca href=\"\/products\/red-sea-marine-care-ammonia-test-100-tests\"\u003eammonia test\u003c\/a\u003e during the first three weeks of a new tank.\u003c\/p\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eFOWLR target\u003c\/th\u003e\n\u003cth\u003eReef target\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate\u003c\/td\u003e\n\u003ctd\u003eUnder 20–40 ppm is generally tolerated\u003c\/td\u003e\n\u003ctd\u003eUnder 5–10 ppm; SPS-dominated systems are usually kept under 2 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese are marine and reef target ranges. This kit is formulated for marine use, so no freshwater community, planted or African cichlid target range applies.\u003c\/p\u003e\u003ch3\u003eWhat to do when a reading is out of range\u003c\/h3\u003e\u003cp\u003eDetectable nitrite in an established tank means the biofilter has been disturbed — check filtration, ease off feeding, retest daily until it returns to zero. Elevated nitrate is corrected with more frequent water changes, reduced feeding, and a nutrient export product such as \u003ca href=\"\/products\/red-sea-no3-po4-x-500ml\"\u003eRed Sea NO3:PO4-X\u003c\/a\u003e or \u003ca href=\"\/products\/red-sea-reef-care-no3-po4-reducer\"\u003eRed Sea NO3\/PO4 Reducer\u003c\/a\u003e media for ongoing control.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eKeep sealed, store between 15–25°C out of direct sun, and check the expiry date printed on the pack before trusting an older kit's result.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees under Australian Consumer Law, in addition to any manufacturer undertaking. Standard parcel freight — no special handling required.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-ammonia-test-100-tests\"\u003eRed Sea Marine Care Ammonia Test Kit\u003c\/a\u003e — the third parameter needed to fully track a new tank's cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-multi-test-kit\"\u003eRed Sea Marine Care Multi Test Kit\u003c\/a\u003e — adds pH and ammonia in the same colorimetric format.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-no3-po4-x-500ml\"\u003eRed Sea NO3:PO4-X\u003c\/a\u003e — nutrient export when nitrate reads high.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eIs a nitrite reading of zero enough to confirm my tank has cycled?\u003c\/h4\u003e\u003cp\u003eNot on its own — ammonia also needs to read zero on the same day. Test both together during cycling.\u003c\/p\u003e\u003ch4\u003eHow high can nitrate go before it's a problem?\u003c\/h4\u003e\u003cp\u003eIt depends on what's in the tank. Fish-only systems tolerate nitrate into the tens of ppm; SPS coral show stress well before that, which is why reef keepers generally aim to keep nitrate under 5–10 ppm.\u003c\/p\u003e\u003ch4\u003eWhy does this kit include more nitrate tests than nitrite tests?\u003c\/h4\u003e\u003cp\u003eNitrite is only critical during cycling and briefly after any biofilter disruption; nitrate gets tested routinely for the life of the tank, so the kit weights the count accordingly — 100 nitrate tests against 60 nitrite.\u003c\/p\u003e\u003ch4\u003eDoes this kit also test ammonia?\u003c\/h4\u003e\u003cp\u003eNo — ammonia is a separate Marine Care kit, or included together with this kit's parameters plus pH in the Multi Test Kit.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774154461475,"sku":"RED312","price":48.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-nitrite-43876673618211.webp?v=1790239001"},{"product_id":"red-sea-marine-care-multi-test-kit","title":"Red Sea Marine Care Multi Test Kit","description":"\u003cp\u003e\u003cstrong\u003eFour everyday parameters, one box.\u003c\/strong\u003e The Red Sea Marine Care Multi Test Kit tests pH, ammonia, nitrite and nitrate in marine and reef aquariums — the four numbers that matter most from the first day of cycling through to weekly maintenance on an established tank. Each parameter uses its own colorimetric reagent, read against a printed colour card.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour parameters in one kit\u003c\/strong\u003e — pH, ammonia, nitrite and nitrate, without buying four separate boxes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 pH tests, 100 ammonia tests, 60 nitrite tests, 100 nitrate tests\u003c\/strong\u003e — nitrite runs out first in heavy use; the other three outlast it comfortably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColorimetric method throughout\u003c\/strong\u003e — no titration, no syringe, straight colour-match against the supplied card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for cycling\u003c\/strong\u003e — the exact parameter set a new marine tank needs tracked daily during maturation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e7.6–8.6\u003c\/td\u003e\n\u003ctd\u003e0.2 pH units per colour step\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmmonia (NH3\/NH4)\u003c\/td\u003e\n\u003ctd\u003e0–2 ppm\u003c\/td\u003e\n\u003ctd\u003e0.2 ppm\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite (NO2)\u003c\/td\u003e\n\u003ctd\u003e0–1 ppm\u003c\/td\u003e\n\u003ctd\u003e0.05 ppm\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate (NO3)\u003c\/td\u003e\n\u003ctd\u003e0–250 ppm\u003c\/td\u003e\n\u003ctd\u003e2 ppm\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eMethod: colorimetric for all four. Water type: marine and reef. Storage: sealed, 15–25°C, use before the expiry date printed on the pack.\u003c\/p\u003e\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\u003cp\u003eThe kit includes reagents, a glass test vial and printed colour comparison cards for all four parameters. It does not include an alkalinity (KH) test — alkalinity is not one of the four parameters in this kit and needs the separate \u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Testing Kit\u003c\/a\u003e. It also does not include a calcium or magnesium test.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any marine or reef aquarium, and especially for new tanks being cycled, where all four parameters need tracking daily. Not a substitute for the dedicated \u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eKH\/Alkalinity\u003c\/a\u003e, \u003ca href=\"\/products\/red-sea-marine-care-calcium-test-kit\"\u003ecalcium\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-marine-care-magnesium-test-kit\"\u003emagnesium\u003c\/a\u003e kits once a reef tank is established and those three become the parameters that matter most week to week.\u003c\/p\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eFOWLR target\u003c\/th\u003e\n\u003cth\u003eReef target\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e8.0–8.3\u003c\/td\u003e\n\u003ctd\u003e8.1–8.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmmonia\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate\u003c\/td\u003e\n\u003ctd\u003eUnder 20–40 ppm is generally tolerated\u003c\/td\u003e\n\u003ctd\u003eUnder 5–10 ppm; SPS-dominated systems are usually kept under 2 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese are marine and reef target ranges. This kit is formulated for marine use, so no freshwater community, planted or African cichlid target range applies.\u003c\/p\u003e\u003ch3\u003eWhat to do when a reading is out of range\u003c\/h3\u003e\u003cp\u003eDetectable ammonia or nitrite in an established tank: immediate partial water change, check the filter is running, ease off feeding, retest daily until both read zero. Elevated nitrate: increase water change frequency, reduce feeding and stocking pressure, and consider a nutrient export product such as \u003ca href=\"\/products\/red-sea-no3-po4-x-500ml\"\u003eRed Sea NO3:PO4-X\u003c\/a\u003e. Low pH: check for adequate surface agitation and gas exchange before dosing a buffer.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eKeep sealed, store between 15–25°C out of direct sun, and check the expiry date printed on the pack before trusting an older kit's result.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees under Australian Consumer Law, in addition to any manufacturer undertaking. Standard parcel freight — no special handling required.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Testing Kit\u003c\/a\u003e — the fifth parameter this kit doesn't cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-calcium-test-kit\"\u003eRed Sea Marine Care Calcium Test Kit\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-marine-care-magnesium-test-kit\"\u003eMagnesium Test Kit\u003c\/a\u003e — the reef-building parameters once a tank is established.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-no3-po4-x-500ml\"\u003eRed Sea NO3:PO4-X\u003c\/a\u003e — nutrient export when nitrate reads high.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eDoes this kit test alkalinity (KH)?\u003c\/h4\u003e\u003cp\u003eNo. This kit covers pH, ammonia, nitrite and nitrate only. Alkalinity needs the separate KH\/Alkalinity Pro Testing Kit.\u003c\/p\u003e\u003ch4\u003eWhich test should I run first in a new tank?\u003c\/h4\u003e\u003cp\u003eAmmonia and nitrite daily from day one — those two tell you where the cycle is up to. pH and nitrate matter once the cycle is underway.\u003c\/p\u003e\u003ch4\u003eWhy does nitrite run out before the other three tests?\u003c\/h4\u003e\u003cp\u003eIt's supplied at 60 tests against 100 for the others, reflecting how it's typically tested less often once a tank is established and nitrite reliably reads zero.\u003c\/p\u003e\u003ch4\u003eIs this kit suitable for a reef tank, or only fish-only systems?\u003c\/h4\u003e\u003cp\u003eBoth. It's the right starting kit for any marine system; established reef tanks generally add calcium, magnesium and alkalinity testing on top of these four.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774154494243,"sku":"RED313","price":122.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-multi-te-46119444545827.webp?v=1790239002"},{"product_id":"red-sea-marine-care-magnesium-test-kit","title":"Red Sea Marine Care Magnesium Test Kit","description":"\u003cp\u003e\u003cstrong\u003eThe element that keeps calcium and alkalinity honest.\u003c\/strong\u003e The Red Sea Marine Care Magnesium Test Kit measures magnesium in marine and reef aquariums by titration — a precise syringe drop-count read straight off the syringe barrel. Magnesium sits quietly in the background of every calcium and alkalinity swing; when either won't hold steady, magnesium is usually the reason.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e75 titration tests per kit\u003c\/strong\u003e — magnesium moves slowly, so this typically lasts well over a year of monthly testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelectable resolution\u003c\/strong\u003e — 100 ppm for a fast check, 50 ppm when you need to confirm a dosing change landed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration method\u003c\/strong\u003e — dose reagent by the drop with the supplied 5 mL syringe until the colour changes; the drop count is the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConversion chart included\u003c\/strong\u003e — reads the drop count straight to ppm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasures\u003c\/td\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMethod\u003c\/td\u003e\n\u003ctd\u003eTitration (syringe drop-count)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003eSelectable 50 ppm or 100 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests per kit\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eSealed, 15–25°C, use before the expiry date printed on the pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\u003cp\u003eThe kit includes Reagent A (15 mL), Reagent B (15 mL), Reagent C (50 mL), a 5 mL syringe, a glass test vial and printed instructions with a colour reference card — everything needed for 75 tests. It does not include a calcium or alkalinity test; those are separate kits, best run alongside this one rather than in isolation.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for any marine or reef system, and most useful in mixed reef and SPS tanks where calcium and alkalinity are being dosed regularly. Less critical on a fish-only tank with no calcifying livestock, where magnesium rarely drifts.\u003c\/p\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSystem type\u003c\/th\u003e\n\u003cth\u003eTarget magnesium\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFOWLR (fish only with live rock)\u003c\/td\u003e\n\u003ctd\u003e1,250–1,350 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMixed reef \/ soft and LPS coral\u003c\/td\u003e\n\u003ctd\u003e1,300–1,400 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPS-dominated reef\u003c\/td\u003e\n\u003ctd\u003e1,300–1,400 mg\/L, held alongside calcium 420–450 mg\/L and alkalinity 7–9 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eThese are marine and reef target ranges. Magnesium is not a parameter tracked in freshwater community, planted or African cichlid tanks, so no freshwater target range applies to this kit.\u003c\/p\u003e\u003ch3\u003eWhat to do when the reading is out of range\u003c\/h3\u003e\u003cp\u003eLow magnesium is corrected with a magnesium supplement such as \u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Reef Care Magnesium Foundation C\u003c\/a\u003e. Raise it gradually rather than in one large dose, and retest a few days later rather than immediately — magnesium takes time to fully equilibrate through the water column.\u003c\/p\u003e\u003ch3\u003eCare and storage\u003c\/h3\u003e\u003cp\u003eKeep sealed, store between 15–25°C out of direct sun, and check the expiry date printed on the pack before trusting an older kit's result.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by the consumer guarantees under Australian Consumer Law, in addition to any manufacturer undertaking. Standard parcel freight — no special handling required.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-marine-care-calcium-test-kit\"\u003eRed Sea Marine Care Calcium Test Kit\u003c\/a\u003e — test together; magnesium stabilises calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-kh-alkalinity-pro-testing-kit-75-tests\"\u003eRed Sea KH\/Alkalinity Pro Testing Kit\u003c\/a\u003e — the third leg of the calcium\/alkalinity\/magnesium triangle.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-magnesium-foundation-c\"\u003eRed Sea Reef Care Magnesium Foundation C\u003c\/a\u003e — the matching dosing solution when magnesium reads low.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhy does low magnesium affect calcium and alkalinity?\u003c\/h4\u003e\u003cp\u003eMagnesium keeps calcium and carbonate in solution at reef-tank concentrations. When magnesium is low, calcium and alkalinity become harder to raise and hold — dosing either one just gets consumed faster or precipitates out.\u003c\/p\u003e\u003ch4\u003eHow often should I test magnesium?\u003c\/h4\u003e\u003cp\u003eMonthly is enough for most tanks — it moves far more slowly than calcium or alkalinity.\u003c\/p\u003e\u003ch4\u003eMy calcium and alkalinity won't hold steady even though I'm dosing correctly — what should I check?\u003c\/h4\u003e\u003cp\u003eTest magnesium. A low reading is the most common hidden cause of calcium and alkalinity instability in an otherwise well-dosed tank.\u003c\/p\u003e\u003ch4\u003eIs this the same as the Magnesium Pro test kit?\u003c\/h4\u003e\u003cp\u003eNo — this is the Marine Care tier, calibrated to 50 or 100 ppm resolution. Red Sea's Magnesium Pro kit is a separate, higher-resolution product for reef keepers chasing tighter control.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774154559779,"sku":"RED349","price":45.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-magnesiu-43876673716515.webp?v=1790239001"},{"product_id":"api-ammonia-test-kit-fresh-saltwater","title":"API Ammonia Test Kit Fresh\/Saltwater","description":"\u003cp\u003e\u003cstrong\u003eThe one reading that explains most unexplained fish losses.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe API Ammonia Test Kit measures total ammonia from 0 to 8 ppm in both freshwater and saltwater aquariums, using two liquid reagents read against a printed colour chart. The pack is rated at approximately 130 tests, and a result takes five minutes from filling the tube. Ammonia is colourless and odourless in water, so testing is the only way to see it before the fish show you.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat it actually measures:\u003c\/strong\u003e total ammonia, which includes ammonia that has already been detoxified by a product such as Ammo-Lock. A positive reading is not automatically a poisoning — see the questions below.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads 0 to 8 ppm\u003c\/strong\u003e — wide enough to cover a fully crashed filter, not just a mild spike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo colour charts in the box\u003c\/strong\u003e — one for freshwater and one for saltwater, because the chemistry reads differently in each.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid reagents in dropper bottles\u003c\/strong\u003e — measured drop by drop rather than a strip that degrades in a humid cupboard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 130 tests per kit\u003c\/strong\u003e — enough for weekly testing on several tanks for well over a year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive-minute result\u003c\/strong\u003e — quick enough to test, act, and re-test the same evening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAmmonia test solution bottle #1\u003c\/li\u003e\n\u003cli\u003eAmmonia test solution bottle #2\u003c\/li\u003e\n\u003cli\u003eGlass test tube with a snap-tight cap\u003c\/li\u003e\n\u003cli\u003eFreshwater colour chart\u003c\/li\u003e\n\u003cli\u003eSaltwater colour chart\u003c\/li\u003e\n\u003cli\u003eInstruction booklet covering how to test and how to correct unsafe readings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNo reference or calibration standard is supplied — the kit is read by colour comparison, not calibrated against a known sample.\u003c\/li\u003e\n\u003cli\u003eNo treatment product. If the reading is above zero you will need something to act on it — see \"Goes well with\".\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eTotal ammonia (free ammonia NH3 plus ammonium NH4+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e0 to 8 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 130\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReagents\u003c\/th\u003e\n\u003ctd\u003eTwo liquid dropper bottles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample volume\u003c\/th\u003e\n\u003ctd\u003e5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003e5 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater types\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater, with a separate colour chart for each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReading method\u003c\/th\u003e\n\u003ctd\u003eVisual colour comparison against the printed chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow to run the test\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFill the test tube to the 5 mL line with aquarium water.\u003c\/li\u003e\n\u003cli\u003eAdd 8 drops from bottle #1.\u003c\/li\u003e\n\u003cli\u003eAdd 8 drops from bottle #2.\u003c\/li\u003e\n\u003cli\u003eCap the tube and shake vigorously for 5 seconds.\u003c\/li\u003e\n\u003cli\u003eWait 5 minutes for the colour to develop.\u003c\/li\u003e\n\u003cli\u003eCompare against the freshwater or saltwater chart in good natural light, holding the tube against the white area of the card.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eHold the dropper bottles vertically so the drops are a consistent size. Rinse the tube with tank water, not detergent, between tests.\u003c\/p\u003e\n\n\u003ch3\u003eWhat the reading should be\u003c\/h3\u003e\n\u003cp\u003eThe target is the same across every setup — zero. What changes is how much urgency a positive reading carries, because the share of total ammonia present as free ammonia (NH3, the toxic form) rises as pH and temperature rise.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eTarget total ammonia\u003c\/th\u003e\n\u003cth\u003eWhat a reading above 0 means here\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunity freshwater\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eUsually overfeeding, a filter cleaned too thoroughly, or a dead fish behind the hardscape. Act the same day.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlanted freshwater\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003ePlants take up some ammonia, so a positive reading in a heavily planted tank suggests the load has outrun the plants and the filter together.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAfrican cichlid\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eThese tanks run alkaline, so more of the total ammonia is present as toxic free ammonia. A reading that would be borderline in a soft-water tank is more serious here.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarine fish-only with live rock\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eMarine pH sits above 8, so the same caution applies. Use the saltwater chart, not the freshwater one.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReef\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eCorals and invertebrates are less tolerant than fish. Any reading above zero is a reason to stop dosing and feeding and investigate immediately.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTank still cycling\u003c\/td\u003e\n\u003ctd\u003eFalls to 0 as the cycle completes\u003c\/td\u003e\n\u003ctd\u003eExpected. Track it alongside nitrite and nitrate to see where the cycle has got to.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWeekly routine testing on established freshwater or marine tanks\u003c\/li\u003e\n\u003cli\u003eTracking a fishless or fish-in cycle from start to finish\u003c\/li\u003e\n\u003cli\u003eDiagnosing sudden fish losses, gasping at the surface or red gills\u003c\/li\u003e\n\u003cli\u003eChecking a quarantine tub, which usually has no mature filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDistinguishing free ammonia from ionised ammonium. This kit reads the total; the split between them is set by your pH and temperature.\u003c\/li\u003e\n\u003cli\u003eConfirming that a detoxifier has worked. Detoxified ammonia still shows on the test.\u003c\/li\u003e\n\u003cli\u003eAnyone who needs a logged, digital number — this is a visual colour match.\u003c\/li\u003e\n\u003cli\u003eTesting anything other than ammonia. Nitrite, nitrate and pH each need their own test.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStore the bottles upright with the caps firmly on, out of direct sun and away from heat.\u003c\/li\u003e\n\u003cli\u003eCheck the use-by date printed on the pack. Liquid reagents drift as they age, and an old bottle #2 is the usual reason a test reads oddly green.\u003c\/li\u003e\n\u003cli\u003eKeep the kit out of reach of children and away from food preparation areas.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-ammo-lock\"\u003eAPI Ammo-Lock\u003c\/a\u003e — the immediate action when the reading is above zero and you have fish in the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e — adds the nitrifying bacteria that bring the reading back to zero permanently.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Test Kit\u003c\/a\u003e — if you also need nitrite, nitrate and pH, the master kit is better value than buying each separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-ph-test-kit\"\u003eAPI Freshwater pH Test Kit\u003c\/a\u003e — pH is what decides how dangerous a given ammonia reading actually is.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/api\"\u003eThe full API range\u003c\/a\u003e — test kits and the treatments that correct what they find.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eNothing here limits your rights under the Australian Consumer Law. If reagents arrive leaking, short-dated or the glass tube is broken, contact us for a replacement.\u003c\/p\u003e\n\u003cp\u003eFreight is standard. The kit ships as an ordinary parcel with no dangerous goods surcharge.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests does the API Ammonia Test Kit do?\u003c\/h4\u003e\n\u003cp\u003eApproximately 130, based on API's pack claim. That figure assumes 8 drops from each bottle per test and a 5 mL sample; using a larger sample volume will reduce the count.\u003c\/p\u003e\n\u003ch4\u003eWhat is a safe ammonia level in an aquarium?\u003c\/h4\u003e\n\u003cp\u003eZero. API's guidance is that small amounts of ammonia stress fish and large amounts kill fish, and there is no level that is actively beneficial. Any reading above zero in a stocked tank is a reason to act.\u003c\/p\u003e\n\u003ch4\u003eI dosed Ammo-Lock and the test still reads 1 ppm. Is the test broken?\u003c\/h4\u003e\n\u003cp\u003eNo. Ammonia detoxifiers convert ammonia to a non-toxic form rather than removing it, and API's own Ammo-Lock label states the water will still test positive until the biological filter processes it out. The reading falls as the filter matures, not as the detoxifier works.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit on a saltwater tank?\u003c\/h4\u003e\n\u003cp\u003eYes. The kit is made for freshwater and saltwater aquariums and includes a separate colour chart for each. Read salt water against the saltwater card — comparing it to the freshwater card will give you the wrong answer.\u003c\/p\u003e\n\u003ch4\u003eWhy choose a liquid kit over test strips?\u003c\/h4\u003e\n\u003cp\u003eLiquid reagents are dosed drop by drop into a measured 5 mL sample, so the result does not depend on how long a strip sat in the water or how much humidity got into the tub. The trade-off is five minutes of waiting instead of thirty seconds.\u003c\/p\u003e\n\u003ch4\u003eThe colour sits between two blocks on the chart. What now?\u003c\/h4\u003e\n\u003cp\u003eRead it as the higher of the two and act on that. Colour-match kits are deliberately banded, and in a stocked tank the cost of over-reacting to 0.25 ppm is a water change you did not strictly need.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774194766115,"sku":null,"price":54.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-ammonia-test-kit-fresh-s-43875853074723.webp?v=1790236364"},{"product_id":"api-calcium-test-kit-liquid-1-25oz-saltwater","title":"API Calcium Test Kit Liquid 1.25oz Saltwater","description":"\u003cp\u003e\u003cstrong\u003eKnow your calcium before your corals tell you the hard way.\u003c\/strong\u003e The API Calcium Test Kit measures calcium in saltwater and reef aquariums by liquid titration — the mineral stony corals, coralline algae, clams and other calcifying invertebrates draw down continuously to build skeleton and shell. A reading here tells you whether your dosing is keeping up with what the tank is actually consuming.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration method\u003c\/strong\u003e — count reagent drops rather than read a colour gradient, which gives a more precise result than a dip strip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads as low as 20 mg\/L\u003c\/strong\u003e — sensitive enough to catch calcium depletion well before it shows up as slowed coral growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSaltwater and reef specific\u003c\/strong\u003e — calibrated for the 400–500 ppm range a reef tank actually runs in, not a freshwater range that doesn't apply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple kit, no equipment\u003c\/strong\u003e — test tube, two reagent bottles and a colour-matched instruction card.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eLiquid titration test kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eCalcium (Ca)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater \/ reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003eReadable to 20 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarget reef range\u003c\/th\u003e\n\u003ctd\u003e400–500 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat's included\u003c\/th\u003e\n\u003ctd\u003e2 reagent bottles, 1 capped test tube, colour-matched instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended testing frequency\u003c\/th\u003e\n\u003ctd\u003eWeekly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cp\u003eFill the test tube to the marked line with tank water, add the first reagent, then add the second reagent one drop at a time, swirling and counting until the colour changes. Each drop typically represents a fixed increment of calcium concentration — follow the conversion on the included card, since API does not publish a universal drops-to-ppm multiplier that applies across all its titration kits.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReef tanks with stony corals, soft corals, clams and coralline algae\u003c\/li\u003e\n\u003cli\u003eFish-only saltwater systems where you also dose calcium for pH stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater aquariums — this kit is formulated and calibrated for saltwater\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-copper-test-kit-liquid-1-25oz-fresh-saltwater\"\u003eAPI Copper Test Kit\u003c\/a\u003e — copper is lethal to the same invertebrates that depend on stable calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-deluxe-ph-test-kit-with-liquid-adjusters\"\u003eAPI Deluxe pH Test Kit with Liquid Adjusters\u003c\/a\u003e — calcium and pH interact; a full picture needs both.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. This does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat calcium level should a reef tank run at?\u003c\/h4\u003e\n\u003cp\u003eAPI's guidance for reef aquariums is a calcium concentration between 400 and 500 mg\/L (ppm). Most stony coral and clam keepers dose to hold within that band and test weekly to catch drift before growth slows.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test calcium?\u003c\/h4\u003e\n\u003cp\u003eAPI recommends weekly testing for saltwater tanks. Calcium demand rises with coral growth and stocking, so a tank that is growing well can draw down faster over time and may need more frequent checks.\u003c\/p\u003e\n\u003ch4\u003eHow many tests are in the kit?\u003c\/h4\u003e\n\u003cp\u003eAPI does not publish an exact test count for this kit on its own product information — unlike its colour-chart kits, a titration kit's test count depends on how many drops each individual test uses, which varies with the sample's calcium level. Expect several dozen tests from a full kit at typical reef calcium levels.\u003c\/p\u003e\n\u003ch4\u003eDoes low calcium affect fish, or only corals and invertebrates?\u003c\/h4\u003e\n\u003cp\u003eCalcium demand in a reef tank is driven mainly by calcifying corals, clams and coralline algae rather than by fish. A fish-only saltwater tank is far more forgiving of calcium drift, though calcium still contributes to overall water hardness and pH stability.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774195224867,"sku":null,"price":54.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-calcium-test-kit-liquid-46120701395235.webp?v=1790239295"},{"product_id":"api-deluxe-ph-test-kit-with-liquid-adjusters","title":"API Deluxe pH Test Kit with Liquid Adjusters","description":"\u003cp\u003e\u003cstrong\u003eTest the pH, then fix it, from one box.\u003c\/strong\u003e The API Deluxe pH Test Kit with Liquid Adjusters pairs a liquid pH test (6.0–7.6, about 250 tests) with bottles of pH Up and pH Down, so a wrong reading doesn't mean a second trip to the shop.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest and correct in one kit\u003c\/strong\u003e — the pH indicator plus both adjusters, together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 250 pH tests\u003c\/strong\u003e — the same reagent as API's standard pH kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid reagent accuracy\u003c\/strong\u003e — a drop-count colour test, read against a printed chart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH Up and pH Down included\u003c\/strong\u003e — raise or lower pH without buying adjusters separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChild-resistant caps\u003c\/strong\u003e — on all three solution bottles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTesting:\u003c\/strong\u003e fill the supplied test tube with a water sample to the marked line, add pH indicator solution as directed on the label, cap and invert to mix, then compare the colour against the printed chart in good light.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjusting:\u003c\/strong\u003e dose pH Up or pH Down into the aquarium following the rate printed on that bottle's label, then retest before dosing again. \u003cstrong\u003eMove pH by no more than 0.2 units in any 24-hour period\u003c\/strong\u003e — a fast swing stresses fish far more than a slightly-off but stable reading. Wait, retest, and repeat gradually rather than dosing to the target in one go.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e6.0 to 7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eLiquid reagent, drop-count colour comparison\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003eAbout 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncludes\u003c\/th\u003e\n\u003ctd\u003epH indicator, pH Up and pH Down solutions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax daily pH change\u003c\/th\u003e\n\u003ctd\u003e0.2 units, per API's dosing guidance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003epH indicator reagent bottle\u003c\/li\u003e\n\u003cli\u003epH Up solution bottle\u003c\/li\u003e\n\u003cli\u003epH Down solution bottle\u003c\/li\u003e\n\u003cli\u003eGlass test tube and colour comparison chart\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoverage above pH 7.6 — an African cichlid tank needs API's wider-range pH kit, which does not include adjusters\u003c\/li\u003e\n\u003cli\u003eA dechlorinator — pH Up and Down adjust pH only, they don't condition tap water\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDosage and directions\u003c\/h3\u003e\n\u003cp\u003eAPI's exact millilitre-per-litre dosing rate for pH Up and pH Down is printed on each bottle's label and was not independently confirmed for this specific pack, so we haven't reproduced a number here rather than risk a wrong one — dose to the rate printed on your bottle. As a general guide, third-party dosing references put API pH Up at roughly 0.1 mL per US gallon (about 0.03 mL per litre) per dose, which is consistent with a gradual, retest-before-redosing approach rather than a single large correction.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater community and planted tanks needing pH testing and correction in the 6.0–7.6 band\u003c\/li\u003e\n\u003cli\u003eGradual pH correction with fish present, dosed carefully against the 0.2-unit daily limit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAfrican cichlid or other tanks running above pH 7.6\u003c\/li\u003e\n\u003cli\u003eLarge, fast pH corrections — always move gradually and retest\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep out of reach of children — all three bottles have child-resistant caps.\u003c\/li\u003e\n\u003cli\u003eAvoid eye and skin contact; rinse well with water if contact occurs.\u003c\/li\u003e\n\u003cli\u003eDo not exceed a 0.2 pH unit change per 24 hours with fish present.\u003c\/li\u003e\n\u003cli\u003eStore bottles capped tightly, away from direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-mini-ph-test-kit\"\u003eAPI Freshwater Mini pH Test Kit\u003c\/a\u003e — a compact tester to keep on hand once your pH is dialled in.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — covers ammonia, nitrite and nitrate alongside pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-gh-and-kh-test-kit\"\u003eAPI GH and KH Test Kit\u003c\/a\u003e — low KH lets pH swing more easily, so it's worth checking alongside a pH correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-stress-coat\"\u003eAPI Stress Coat\u003c\/a\u003e — condition any fresh water added during a water change made alongside a pH correction.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test and treatment kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow fast can I safely change my aquarium's pH?\u003c\/h4\u003e\n\u003cp\u003eNo more than 0.2 pH units in 24 hours with fish present. Dose a small amount, wait, retest, and repeat gradually — a slow correction over several days is safer than one large dose.\u003c\/p\u003e\n\u003ch4\u003eWill this kit suit an African cichlid tank?\u003c\/h4\u003e\n\u003cp\u003eNot reliably — its range tops out at 7.6, and cichlids are often kept at 8.2 or higher. Use API's wider-range Freshwater pH Test Kit for those tanks, and a separate high-range adjuster if correction is needed.\u003c\/p\u003e\n\u003ch4\u003eDo I need to dechlorinate water before adjusting pH?\u003c\/h4\u003e\n\u003cp\u003eYes, in the sense that pH Up and pH Down don't replace a dechlorinator — they only move pH. Condition any new water with a product like API Stress Coat as normal.\u003c\/p\u003e\n\u003ch4\u003eCan I use pH Up and pH Down in a planted tank?\u003c\/h4\u003e\n\u003cp\u003eLive plants are generally tolerant of these adjusters when dosed at the gradual rate on the label, but a large or fast correction can still stress soft-water plant species. Move slowly and watch the tank's response.\u003c\/p\u003e\n\u003ch4\u003eWhat if my pH keeps drifting back after I correct it?\u003c\/h4\u003e\n\u003cp\u003eThat's usually a sign your KH (carbonate hardness) is low and not buffering the water, so pH swings with every water change or CO2 fluctuation. Test KH with a kit such as API's GH and KH Test Kit before repeatedly dosing pH adjusters.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774195388707,"sku":null,"price":48.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-deluxe-ph-test-kit-with-43875853369635.webp?v=1790236362"},{"product_id":"api-freshwater-master-multi-test-kit-5-in-1","title":"API Freshwater Master Multi Test Kit 5 in 1","description":"\u003cp\u003e\u003cstrong\u003eThe one kit that answers \"is my tank actually cycled?\" — not just \"what's my pH?\"\u003c\/strong\u003e The API Freshwater Master Test Kit tests five parameters in one box: pH, high range pH, ammonia, nitrite and nitrate. It's a liquid titration and colour-match kit good for approximately 800 tests combined across all five, and it's the kit API themselves point new fishkeepers to for cycling a tank.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive parameters, one kit\u003c\/strong\u003e — pH, high range pH, ammonia, nitrite and nitrate, the full set you need to confirm a tank has cycled.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 800 tests combined\u003c\/strong\u003e — across all five parameters, from seven reagent bottles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid reagents, not strips\u003c\/strong\u003e — API rates liquid tests as more accurate than dip strips for this kind of monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaminated, computer-calibrated colour card\u003c\/strong\u003e — built to last through hundreds of comparisons without fading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour test tubes and a holding tray\u003c\/strong\u003e — so you can run more than one parameter at a time without losing track.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003eFill each test tube with an aquarium water sample, add the drops specified for that parameter's reagent, cap, and mix as instructed — API's own directions note that reagent bottles should be shaken vigorously, but test tubes should only be inverted gently, back and forth every 1–2 seconds, rather than shaken hard. Compare the result against the laminated colour card. Rinse each test tube with water immediately after reading, before reagent residue has a chance to stain the glass. API recommends testing weekly for an established tank, and daily for ammonia and nitrite while a new tank is cycling.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH, high range pH, ammonia, nitrite, nitrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eLiquid reagent, drop-count titration and colour comparison\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal tests\u003c\/th\u003e\n\u003ctd\u003eApproximately 800, combined across all five parameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePer-parameter test count\u003c\/th\u003e\n\u003ctd\u003eNot published by API — see note below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTesting frequency\u003c\/th\u003e\n\u003ctd\u003eWeekly for an established tank; daily for ammonia and nitrite while cycling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAPI's own materials state the total test count as approximately 800 but do not break that figure down per parameter, since each reagent uses a different number of drops per test. We haven't invented a per-parameter split.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSeven reagent test solution bottles\u003c\/li\u003e\n\u003cli\u003eFour glass test tubes with snap-tight caps\u003c\/li\u003e\n\u003cli\u003eA holding tray\u003c\/li\u003e\n\u003cli\u003eLaminated, computer-calibrated colour card\u003c\/li\u003e\n\u003cli\u003eStep-by-step instruction booklet, including guidance on correcting an unsafe reading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAnything to correct a bad reading — pair with the right product once you know what's wrong (see below)\u003c\/li\u003e\n\u003cli\u003eGH or KH testing — this kit doesn't cover hardness; add API's GH and KH Test Kit for that\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat each reading means, and target ranges\u003c\/h3\u003e\n\u003cp\u003ePer API's own published water parameter chart, checked 7 August 2026:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eIdeal\u003c\/th\u003e\n\u003cth\u003eCaution\u003c\/th\u003e\n\u003cth\u003eDanger\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmmonia\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003eAny detectable reading\u003c\/td\u003e\n\u003ctd\u003eSustained detectable reading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite\u003c\/td\u003e\n\u003ctd\u003e0 ppm\u003c\/td\u003e\n\u003ctd\u003e0.5–1.0 ppm\u003c\/td\u003e\n\u003ctd\u003e3.0+ ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate\u003c\/td\u003e\n\u003ctd\u003e0–40 ppm\u003c\/td\u003e\n\u003ctd\u003e40–80 ppm\u003c\/td\u003e\n\u003ctd\u003e160+ ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH (community tropical)\u003c\/td\u003e\n\u003ctd\u003eAround 6.8–7.2\u003c\/td\u003e\n\u003ctd\u003e6.0–6.8 or 7.2–8.0\u003c\/td\u003e\n\u003ctd\u003eOutside the tested range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAmmonia and nitrite should read zero in a fully cycled, stocked tank — any reading above zero on either is a sign the biological filter isn't keeping up, and calls for a water change and reduced feeding while you investigate. Nitrate is expected to rise gradually between water changes and is corrected by the water change itself, not by a treatment product.\u003c\/p\u003e\n\n\u003ch3\u003eWhen a reading is out of range\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmmonia or nitrite above zero:\u003c\/strong\u003e do a partial water change, reduce feeding, and retest daily until it returns to zero. \u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e adds live nitrifying bacteria if the tank is newly set up or the filter has been disturbed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrate climbing steadily:\u003c\/strong\u003e increase water change frequency or volume. This kit will tell you it's happening; it won't fix it on its own.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH outside your target band:\u003c\/strong\u003e retest with a dedicated pH kit and correct gradually — see \u003ca href=\"\/products\/api-deluxe-ph-test-kit-with-liquid-adjusters\"\u003eAPI Deluxe pH Test Kit with Liquid Adjusters\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCycling a new freshwater tank — daily ammonia and nitrite checks are exactly what this kit is built for\u003c\/li\u003e\n\u003cli\u003eOngoing weekly monitoring of an established freshwater community tank\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSaltwater or reef tanks — API sells a separate Saltwater Master Test Kit calibrated for marine ranges\u003c\/li\u003e\n\u003cli\u003eGH\/KH hardness testing — not covered by this kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep out of reach of children.\u003c\/li\u003e\n\u003cli\u003eAvoid eye and skin contact with reagents; rinse well with water if contact occurs.\u003c\/li\u003e\n\u003cli\u003eShake reagent bottles vigorously before use; invert test tubes gently rather than shaking them.\u003c\/li\u003e\n\u003cli\u003eRinse test tubes immediately after each test.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-gh-and-kh-test-kit\"\u003eAPI GH and KH Test Kit\u003c\/a\u003e — the two hardness parameters this kit doesn't cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e — live nitrifying bacteria for when ammonia or nitrite won't clear.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-stress-coat\"\u003eAPI Stress Coat\u003c\/a\u003e — for the water changes this kit will tell you to do.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-mini-ph-test-kit\"\u003eAPI Freshwater Mini pH Test Kit\u003c\/a\u003e — a compact spare for quick pH-only checks between full test rounds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDo I need this if I already have a single pH test kit?\u003c\/h4\u003e\n\u003cp\u003eFor cycling a new tank, yes. Ammonia and nitrite are what actually confirm a tank is safe to stock, and a pH-only kit won't show you either. This kit adds both, plus nitrate and a second, higher-range pH test.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test while cycling a new tank?\u003c\/h4\u003e\n\u003cp\u003eDaily for ammonia and nitrite until both read zero for several consecutive days with fish or a full bioload present. Weekly is enough once the tank is established.\u003c\/p\u003e\n\u003ch4\u003eMy ammonia reads above zero but my fish seem fine. Do I need to act?\u003c\/h4\u003e\n\u003cp\u003eYes — ammonia is toxic at low concentrations even before visible symptoms appear, and its danger increases with pH. Do a partial water change and retest rather than waiting for signs of stress.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit work for a saltwater tank?\u003c\/h4\u003e\n\u003cp\u003eNo — this is the freshwater-calibrated kit. API sells a separate Saltwater Master Test Kit with ranges suited to marine and reef parameters.\u003c\/p\u003e\n\u003ch4\u003eWhy does the kit include two different pH tests?\u003c\/h4\u003e\n\u003cp\u003eStandard freshwater pH and \"high range\" pH use different reagents calibrated to different parts of the scale, so between them the kit reads accurately from soft, acidic water through to the alkaline end some cichlid and livebearer tanks run at.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774195421475,"sku":null,"price":79.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-freshwater-master-multi-46120700412195.webp?v=1790239295"},{"product_id":"api-nitrate-test-kit-fresh-saltwater","title":"API Nitrate Test Kit Fresh\/Saltwater","description":"\u003cp\u003e\u003cstrong\u003eTracks the end product of the nitrogen cycle before it drives an algae bloom.\u003c\/strong\u003e The API Nitrate Test Kit measures nitrate (NO₃⁻) from 0 to 160 ppm in fresh or saltwater, using a liquid reagent test read against two colour charts — one for freshwater, one for saltwater. Each kit contains about 90 tests.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e0–160 ppm range\u003c\/strong\u003e — covers everything from a healthy reading to a serious spike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater charts included\u003c\/strong\u003e — two separate colour cards, because the target reading differs by water type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 90 tests per kit\u003c\/strong\u003e — works out to about 59c per test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 mL sample\u003c\/strong\u003e — small enough to test often without disturbing the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-reagent test\u003c\/strong\u003e — both bottles matter; under-shaking Bottle #2 is the most common cause of a false low reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFill the supplied test tube to the 5 mL line with a water sample.\u003c\/li\u003e\n\u003cli\u003eAdd 10 drops from Bottle #1 and invert the tube several times to mix.\u003c\/li\u003e\n\u003cli\u003eShake Bottle #2 vigorously for at least 30 seconds before opening it — API states this step is extremely important, since the nitrate reagent settles and under-reads if it isn't shaken hard enough.\u003c\/li\u003e\n\u003cli\u003eAdd 10 drops from Bottle #2, then shake the closed tube vigorously for a full minute.\u003c\/li\u003e\n\u003cli\u003eWait 5 minutes for the colour to develop.\u003c\/li\u003e\n\u003cli\u003eCompare against the matching colour card — freshwater or saltwater — for your tank.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eNitrate (NO₃⁻)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e0 to 160 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample size\u003c\/th\u003e\n\u003ctd\u003e5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003e5 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater (two colour charts included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 90 — see note below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAPI's own product page does not state a tests-per-kit figure. The ~90 figure above is consistent across several independent retailers who reproduce the count printed on API's packaging; treat it as a close approximation rather than a guaranteed count.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBottle #1 and Bottle #2 reagent solutions\u003c\/li\u003e\n\u003cli\u003eGlass test tube\u003c\/li\u003e\n\u003cli\u003eFreshwater colour card\u003c\/li\u003e\n\u003cli\u003eSaltwater colour card\u003c\/li\u003e\n\u003cli\u003eInstruction booklet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA reference or calibration standard\u003c\/li\u003e\n\u003cli\u003eAny product for correcting a high reading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTarget ranges\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eTarget nitrate\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFreshwater community\u003c\/td\u003e\n\u003ctd\u003e40 ppm or below — API's recommended ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarine and reef, especially with invertebrates\u003c\/td\u003e\n\u003ctd\u003eAs low as practically achievable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAPI does not publish a single numeric marine target; it advises keeping nitrate as low as possible where invertebrates are kept, since they're markedly more sensitive to nitrate than fish.\u003c\/p\u003e\n\n\u003ch3\u003eWhen the reading is out of range\u003c\/h3\u003e\n\u003cp\u003eA rising nitrate reading is usually a water-change signal rather than an emergency, but a stubborn or climbing number is worth acting on before it turns into algae. \u003ca href=\"\/products\/api-nitra-zorb-210l\"\u003eAPI Nitra-Zorb\u003c\/a\u003e is rated by API to remove nitrate, alongside ammonia and nitrite, from freshwater between water changes. Increasing water change frequency and reducing feeding are the other two levers, and neither needs a product.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater and marine fish-only and reef systems\u003c\/li\u003e\n\u003cli\u003eRoutine weekly-to-fortnightly monitoring\u003c\/li\u003e\n\u003cli\u003eDiagnosing an algae outbreak or general water-quality check\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplacing an ammonia or nitrite test — nitrate is the end product of the nitrogen cycle, not the early warning sign\u003c\/li\u003e\n\u003cli\u003eA newly cycling tank on its own — pair it with an ammonia and nitrite kit, or the Freshwater Master kit, while the tank is establishing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAvoid skin and eye contact with either reagent.\u003c\/li\u003e\n\u003cli\u003eKeep both reagent bottles out of reach of children.\u003c\/li\u003e\n\u003cli\u003eRinse the test tube between uses so old reagent doesn't skew the next reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — ammonia, nitrite, nitrate, pH and high-range pH in one kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-ammonia-test-kit-fresh-saltwater\"\u003eAPI Ammonia Test Kit Fresh\/Saltwater\u003c\/a\u003e — the parameter to watch alongside nitrate in a newer tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-nitra-zorb-210l\"\u003eAPI Nitra-Zorb (210L)\u003c\/a\u003e — the product to run when your nitrate reading comes back high.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy.\u003c\/p\u003e\n\u003cp\u003eShips as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat's a safe nitrate level for my tank?\u003c\/h4\u003e\n\u003cp\u003eAPI recommends 40 ppm or below for a freshwater community tank. Marine and reef tanks, especially with invertebrates, should be kept much lower — as close to zero as practically achievable.\u003c\/p\u003e\n\u003ch4\u003eWhy does the kit include two colour charts?\u003c\/h4\u003e\n\u003cp\u003eFresh and saltwater develop the test colour slightly differently, so API supplies a separate chart calibrated for each water type. Always read against the chart that matches your tank.\u003c\/p\u003e\n\u003ch4\u003eWhy did my reading come out lower than I expected?\u003c\/h4\u003e\n\u003cp\u003eThe most common cause is under-shaking Bottle #2. API states the 30-second shake before opening the bottle, and the full minute of shaking after adding it, are both extremely important steps — the reagent settles and under-reads without them.\u003c\/p\u003e\n\u003ch4\u003eHow many tests will one kit give me?\u003c\/h4\u003e\n\u003cp\u003eAround 90, based on the count printed on API's packaging as reproduced by several independent retailers. API's own website doesn't state a figure, so treat this as an approximation.\u003c\/p\u003e\n\u003ch4\u003eCan this kit test ammonia or nitrite too?\u003c\/h4\u003e\n\u003cp\u003eNo, this kit measures nitrate only. Pair it with API's Ammonia and Nitrite kits, or the Freshwater Master Multi Test Kit, to cover the full nitrogen cycle.\u003c\/p\u003e\n\u003ch4\u003eWhat do I do if my nitrate keeps climbing?\u003c\/h4\u003e\n\u003cp\u003eIncrease water change frequency, check you're not overfeeding, and consider a nitrate-reducing filter media such as API Nitra-Zorb between changes.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774195912995,"sku":null,"price":53.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-nitrate-test-kit-fresh-s-43875854549283.webp?v=1790236364"},{"product_id":"api-nitrite-test-kit-freshwater-saltwater","title":"API Nitrite Test Kit Freshwater\/Saltwater","description":"\u003cp\u003e\u003cstrong\u003eCatches the toxic middle stage of the nitrogen cycle before it damages gills.\u003c\/strong\u003e The API Nitrite Test Kit is a liquid reagent test for nitrite (NO2-) in fresh or saltwater aquariums, reading 0 to 5.0 ppm. It ships as a reagent bottle, a capped test tube, a colour comparison card and an instruction booklet, and API states the kit is good for around 180 tests.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads nitrite 0–5.0 ppm\u003c\/strong\u003e — covers the full range a new or disturbed tank can spike to.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater\u003c\/strong\u003e — one reagent, one procedure, either water type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 180 tests per kit\u003c\/strong\u003e — enough for daily testing through a full cycling period with plenty left for ongoing monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast liquid test\u003c\/strong\u003e — add reagent to a 5 mL sample, shake, wait five minutes, read against the chart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour card reads in ppm steps\u003c\/strong\u003e — lets you track whether a spike is rising or falling, not just whether it's present.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003eFollowing API's testing procedure:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eFill the supplied test tube to the 5 mL line with a water sample.\u003c\/li\u003e\n\u003cli\u003eAdd Nitrite Test Solution — see the instruction booklet for the exact drop count.\u003c\/li\u003e\n\u003cli\u003eCap and shake for the specified time.\u003c\/li\u003e\n\u003cli\u003eWait five minutes for the colour to fully develop.\u003c\/li\u003e\n\u003cli\u003eCompare the sample against the colour card in good natural light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eTest every other day while a tank is cycling, when nitrite is most likely to spike, and weekly once the biological filter is established — typically four to six weeks after setup.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eNitrite (NO2-)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e0 to 5.0 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample size\u003c\/th\u003e\n\u003ctd\u003e5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003e5 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 180\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNitrite Test Solution reagent bottle\u003c\/li\u003e\n\u003cli\u003eCapped glass test tube\u003c\/li\u003e\n\u003cli\u003eColour comparison card\u003c\/li\u003e\n\u003cli\u003eInstruction booklet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA reference or calibration standard\u003c\/li\u003e\n\u003cli\u003eAny treatment for correcting a positive reading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen the reading is out of range\u003c\/h3\u003e\n\u003cp\u003eAny nitrite reading above zero calls for an immediate water change to dilute it, and a check of what disturbed the biological filter — a substrate clean, a filter media change or a new fish load are the usual causes. In freshwater, a small dose of \u003ca href=\"\/products\/api-aquarium-salt\"\u003eAPI Aquarium Salt\u003c\/a\u003e reduces nitrite's toxicity to gills while the filter catches up; it does not remove nitrite itself. \u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e adds live nitrifying bacteria to help re-establish the biological filter after a spike.\u003c\/p\u003e\n\u003cp\u003eRetest daily until the reading returns to zero, and check \u003ca href=\"\/products\/api-ammonia-test-kit-fresh-saltwater\"\u003eammonia\u003c\/a\u003e at the same time — a nitrite spike often follows an ammonia spike as the same cycling fault.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNew tank cycling, where nitrite is the second stage to test for\u003c\/li\u003e\n\u003cli\u003eDiagnosing fish gasping at the surface or gill damage with no obvious cause\u003c\/li\u003e\n\u003cli\u003eFresh and saltwater fish-only and community systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasuring ammonia or nitrate — API sells separate kits for each stage of the cycle\u003c\/li\u003e\n\u003cli\u003eOngoing daily use once a tank is fully cycled and stable — weekly testing is enough\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eAs with any liquid reagent test kit, keep the solution away from children, avoid contact with skin and eyes, and follow the instruction booklet if the reagent is splashed or swallowed.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-ammonia-test-kit-fresh-saltwater\"\u003eAPI Ammonia Test Kit Fresh\/Saltwater\u003c\/a\u003e — the stage of the cycle that usually spikes just before nitrite does.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — tracks nitrite alongside pH, ammonia, nitrate and KH in one kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-aquarium-salt\"\u003eAPI Aquarium Salt\u003c\/a\u003e — reduces nitrite's toxicity to gills while a spike is brought under control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e — live nitrifying bacteria to re-establish the biological filter after a spike.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy.\u003c\/p\u003e\n\u003cp\u003eShips as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this kit test freshwater and saltwater tanks?\u003c\/h4\u003e\n\u003cp\u003eYes. API rates the same reagent and procedure for both water types.\u003c\/p\u003e\n\u003ch4\u003eHow many tests are in one kit?\u003c\/h4\u003e\n\u003cp\u003eApproximately 180, based on API's published pack count. Actual test count can vary slightly with sample technique.\u003c\/p\u003e\n\u003ch4\u003eWhy is nitrite dangerous if I can't see or smell it?\u003c\/h4\u003e\n\u003cp\u003eNitrite crosses fish gills and interferes with oxygen transport in the blood, a condition sometimes called \"brown blood disease.\" Fish can be visibly stressed or gasping well before the water looks or smells any different, which is why testing rather than observation is the reliable way to catch it.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test for nitrite?\u003c\/h4\u003e\n\u003cp\u003eEvery other day while a tank is cycling, and weekly once the biological filter is established, typically four to six weeks after setup.\u003c\/p\u003e\n\u003ch4\u003eDoes salt actually remove nitrite?\u003c\/h4\u003e\n\u003cp\u003eNo. Salt reduces nitrite's toxicity to fish gills by competing for uptake, but it does not remove nitrite from the water. A water change and restoring the biological filter are what bring the reading back down.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774195945763,"sku":null,"price":41.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-nitrite-test-kit-freshwa-46120701428003.webp?v=1790239294"},{"product_id":"api-ph-high-range-test-kit-fresh-saltwater","title":"API pH High Range Test Kit Fresh\/Saltwater","description":"\u003cp\u003e\u003cstrong\u003eReads pH where a standard kit runs out of scale.\u003c\/strong\u003e The API High Range pH Test Kit measures pH from 7.4 to 8.8 — the band needed for African cichlids, marine and reef tanks, brackish setups and livebearers, where a standard freshwater pH kit tops out at its darkest colour and tells you nothing more.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads pH 7.4–8.8\u003c\/strong\u003e — covers the alkaline range standard kits can't resolve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater\u003c\/strong\u003e — one reagent for African cichlid tanks, marine systems and brackish setups alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo colour cards included\u003c\/strong\u003e — for comparing accurately across the full range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 160 tests per kit\u003c\/strong\u003e — enough for weekly testing across several tanks for years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple liquid procedure\u003c\/strong\u003e — drops into a sample, shake, compare against the chart.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003eFill the supplied test tube with a water sample to the line, add High Range pH Test Solution as directed in the instruction booklet, cap and shake, then compare the colour against the included colour cards in good light. If your standard-range pH kit always reads its darkest colour, that's the signal to switch to this kit rather than assume the tank is fine.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e7.4 to 8.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 160\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh Range pH Test Solution reagent bottle\u003c\/li\u003e\n\u003cli\u003eCapped test tube\u003c\/li\u003e\n\u003cli\u003eTwo colour comparison cards\u003c\/li\u003e\n\u003cli\u003eInstruction booklet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA standard-range pH test for tanks below 7.4 — API sells this as a separate kit\u003c\/li\u003e\n\u003cli\u003eAny pH adjustment product\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen the reading is out of range\u003c\/h3\u003e\n\u003cp\u003eA reading near the bottom of this kit's range (close to 7.4) in a system that should be more alkaline — marine, reef, African cichlid or livebearer — points to insufficient buffering; check KH and consider a buffering product suited to that system. A reading pinned at the top of the chart calls for care rather than more buffer — this kit cannot resolve any higher than 8.8, so a very high reading needs a wider-range test to quantify properly.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAfrican cichlid tanks, typically kept at pH 7.8–8.6\u003c\/li\u003e\n\u003cli\u003eMarine and reef aquariums, typically pH 8.0–8.4\u003c\/li\u003e\n\u003cli\u003eBrackish setups and livebearers such as mollies and platies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard community and soft-water tanks below pH 7.4 — use API's standard-range pH kit instead\u003c\/li\u003e\n\u003cli\u003eDetermining KH or alkalinity — this kit reads pH only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eAs with any liquid reagent test kit, keep the solution away from children, avoid skin and eye contact, and follow the instruction booklet if the reagent is splashed or swallowed.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — pairs the standard pH range with ammonia, nitrite, nitrate and KH.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-ph-proper-8-2-powder-jar-200gm\"\u003eAPI pH Proper 8.2\u003c\/a\u003e — a buffered powder for holding African cichlid or brackish tanks at a stable alkaline pH.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-ph-up\"\u003eAPI pH Up\u003c\/a\u003e — for raising pH into this kit's readable range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy.\u003c\/p\u003e\n\u003cp\u003eShips as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eMy standard pH kit always reads dark blue — do I need this kit?\u003c\/h4\u003e\n\u003cp\u003eYes. A standard-range API pH kit stops resolving once pH rises above roughly 7.6, so a reading that always looks maximal doesn't tell you whether your tank is at 7.6 or 8.8. This kit reads that upper range specifically.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit work for both marine and African cichlid tanks?\u003c\/h4\u003e\n\u003cp\u003eYes. Both sit within this kit's 7.4–8.8 range, and API rates the same reagent for fresh and saltwater.\u003c\/p\u003e\n\u003ch4\u003eHow many tests come in one kit?\u003c\/h4\u003e\n\u003cp\u003eApproximately 160, based on API's published pack count.\u003c\/p\u003e\n\u003ch4\u003eWhat if my reading is below 7.4?\u003c\/h4\u003e\n\u003cp\u003eSwitch to API's standard-range pH kit, which reads accurately below 7.6 and overlaps with the bottom of this kit's range.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774196044067,"sku":null,"price":32.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-ph-high-range-test-kit-f-43875854680355.webp?v=1790236363"},{"product_id":"api-quick-testing-strips-5-in1-25-pack","title":"API Quick Testing Strips 5 in1 25 Pack","description":"\u003cp\u003e\u003cstrong\u003eFive readings in one dip, twenty-five dips to a tube.\u003c\/strong\u003e API 5-in-1 Test Strips read pH, carbonate hardness (KH), general hardness (GH), nitrite and nitrate from a single strip in under a minute — the standard weekly screen for spotting a problem before it stresses fish. This tube holds 25 strips, enough for roughly six months of weekly testing.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive parameters in one dip\u003c\/strong\u003e — pH, KH, GH, nitrite and nitrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResults in under a minute\u003c\/strong\u003e — GH and KH read immediately, pH, nitrite and nitrate after 30 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo drops or vials\u003c\/strong\u003e — dip, swirl, read against the printed colour chart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 strips per tube\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater\u003c\/strong\u003e for pH, nitrite and nitrate; GH and KH are freshwater-calibrated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDip the strip into the aquarium and swirl twice.\u003c\/li\u003e\n\u003cli\u003eRemove horizontally, pads facing up, without shaking off the water.\u003c\/li\u003e\n\u003cli\u003eRead GH and KH immediately.\u003c\/li\u003e\n\u003cli\u003eWait 30 seconds, then read pH, nitrite and nitrate.\u003c\/li\u003e\n\u003cli\u003eCompare each pad to the colour chart on the tube, in good light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH, KH, GH, nitrite, nitrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003eImmediate (GH, KH); 30 seconds (pH, nitrite, nitrate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per tube\u003c\/th\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFresh and saltwater (pH, nitrite, nitrate); freshwater only (GH, KH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eRanges and target values\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eRange read\u003c\/th\u003e\n\u003cth\u003eTypical target\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e6.0 – 9.0\u003c\/td\u003e\n\u003ctd\u003e6.8–7.2 community · 8.2–8.4 saltwater · 8.2+ African cichlids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKH\u003c\/td\u003e\n\u003ctd\u003e0 – 240 ppm (freshwater)\u003c\/td\u003e\n\u003ctd\u003e80 ppm most tropical fish · 180–240 ppm Rift Lake cichlids\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGH\u003c\/td\u003e\n\u003ctd\u003e0 – 180 ppm (freshwater)\u003c\/td\u003e\n\u003ctd\u003e60 ppm most tropical fish · 120–180 ppm livebearers, cichlids, goldfish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrite\u003c\/td\u003e\n\u003ctd\u003e0 – 10 ppm\u003c\/td\u003e\n\u003ctd\u003e0 ppm, always, in a cycled tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNitrate\u003c\/td\u003e\n\u003ctd\u003e0 – 200 ppm\u003c\/td\u003e\n\u003ctd\u003e40 ppm or under, freshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThese are API's general guidelines rather than a hard target for every species — treat a sudden change as more urgent than sitting slightly outside the \"typical\" figure.\u003c\/p\u003e\n\n\u003ch3\u003eWhich pack size do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e4 strips\u003c\/td\u003e\n\u003ctd\u003eA first check, or trying the format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e25 strips\u003c\/td\u003e\n\u003ctd\u003eOngoing weekly testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eWhen a reading is out of range\u003c\/h3\u003e\n\u003cp\u003eNitrite above zero or nitrate climbing points to an incomplete or overloaded biological filter — \u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e seeds the bacteria that processes both. A KH reading trending down explains a falling pH before it becomes a crash. For a target concentration during medication, follow that product's own label rather than this strip.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e weekly screening across freshwater and saltwater aquariums, and spotting a developing problem early.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e precision reef dosing or diagnosing marine hardness — GH and KH on this strip are freshwater-calibrated only; use a dedicated marine test for those in a reef tank.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests are in one tube?\u003c\/h4\u003e\n\u003cp\u003e25 strips, each reading all five parameters.\u003c\/p\u003e\n\u003ch4\u003eDo GH and KH work in a saltwater tank?\u003c\/h4\u003e\n\u003cp\u003eNo — API calibrates those two pads for freshwater. pH, nitrite and nitrate on the same strip do work in saltwater.\u003c\/p\u003e\n\u003ch4\u003eWhat's the difference between this and a liquid test kit?\u003c\/h4\u003e\n\u003cp\u003e\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI's Freshwater Master Multi Test Kit\u003c\/a\u003e reads the same five parameters with titrated liquid tests, which read finer increments but take longer per test than a strip.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774197748003,"sku":null,"price":54.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-quick-testing-strips-5-i-43875855728931.webp?v=1790239539"},{"product_id":"api-quick-testing-strips-ammonia","title":"API Quick Testing Strips Ammonia","description":"\u003cp\u003e\u003cstrong\u003eSpot dangerous ammonia spikes before they harm your fish.\u003c\/strong\u003e API Quick Testing Strips Ammonia are dip-and-read ammonia test strips that measure total ammonia across a 0-6 ppm range in both fresh and saltwater aquariums, ponds, and quarantine tanks. Each pack holds 25 strips in a desiccant-lined, snap-cap tube to keep them accurate test after test. They suit fishkeepers cycling a new tank, running routine water-quality checks, or watching ammonia in a hospital or quarantine setup.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThese ammonia test strips read total ammonia (NH3\/NH4+) from 0-6 ppm (mg\/L) directly in aquarium water\u003c\/li\u003e\n\u003cli\u003eDip-and-read format - no separate reagent vials, mixing, or shaking required\u003c\/li\u003e\n\u003cli\u003eSuitable for both freshwater and saltwater aquariums\u003c\/li\u003e\n\u003cli\u003e25 strips per tube, stored in a desiccant-lined, snap-tight cap tube to protect against moisture\u003c\/li\u003e\n\u003cli\u003eColour chart supplied with guidance on correcting unsafe ammonia readings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTests per pack\u003c\/td\u003e\n\u003ctd\u003e25 strips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParameter tested\u003c\/td\u003e\n\u003ctd\u003eTotal ammonia (NH3\/NH4+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTest range\u003c\/td\u003e\n\u003ctd\u003e0-6 ppm (mg\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour chart resolution\u003c\/td\u003e\n\u003ctd\u003eNot published by the manufacturer - read against the colour chart supplied in the pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTime to result\u003c\/td\u003e\n\u003ctd\u003eNot published by the manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eDip-and-read strip, no liquid reagents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included and what you'll still need\u003c\/h3\u003e\n\u003cp\u003eEach tube contains 25 test strips and a printed colour comparison chart with guidance on correcting unsafe readings. You won't need a separate test vial, reagent bottles, or a timer - just dip the strip in the water and match it to the chart.\u003c\/p\u003e\n\u003cp\u003eIf a reading comes back above 0 ppm, you'll need a way to bring it down, typically an ammonia-neutralising conditioner or a partial water change, plus ongoing retesting until the level returns to zero. These are sold separately.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for \/ not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e these ammonia test strips suit freshwater and saltwater aquariums, ponds needing a quick check, new tank cycling, and quarantine or hospital tanks where ammonia needs frequent monitoring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e distinguishing between toxic un-ionised ammonia (NH3) and the far less harmful ionised form (NH4+) - the strip reads total ammonia only. Not a substitute for a laboratory-grade meter where the manufacturer has not published a numeric accuracy specification for this strip format.\u003c\/p\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eKeep the tube's cap snapped tight between uses, as the desiccant lining only protects strips still sealed inside. Store in a cool, dry place out of direct sunlight, and avoid touching the reagent pad with your fingers before dipping.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eA product-specific safety data sheet for this exact test strip pack could not be confirmed at time of writing, so no hazard statements are quoted here. As general handling practice: keep the tube out of reach of children and pets, avoid ingesting the strips, avoid contact with eyes, wash hands after handling, and dispose of used strips according to your local council guidelines.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cp\u003ePair this with pH, nitrite and nitrate test kits for the full water-quality picture during cycling, plus an ammonia-neutralising water conditioner to have on hand for when a reading comes back positive.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis product is covered by the consumer guarantees under the Australian Consumer Law, including your right to a replacement, repair or refund if it is faulty, not fit for purpose, or significantly different from the description on this page. Contact us if you have any concerns about a pack of test strips and we'll resolve it in line with your rights under the ACL.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests are in one pack?\u003c\/h4\u003e\n\u003cp\u003eEach tube contains 25 individual test strips.\u003c\/p\u003e\n\n\u003ch4\u003eWhat ammonia range do these strips read?\u003c\/h4\u003e\n\u003cp\u003eThey read total ammonia from 0 to 6 ppm (mg\/L), covering the range you're likely to see during cycling or a spike in an established tank.\u003c\/p\u003e\n\n\u003ch4\u003eCan I use these in a saltwater or reef tank?\u003c\/h4\u003e\n\u003cp\u003eYes. The manufacturer states these strips are suitable for both freshwater and saltwater aquariums, which includes reef and FOWLR setups.\u003c\/p\u003e\n\n\u003ch4\u003eWhat ammonia level should I be aiming for?\u003c\/h4\u003e\n\u003cp\u003eZero. Ammonia is toxic to fish at any detectable level, and the manufacturer states the only safe total ammonia level for an aquarium is zero, whether it's a community, planted, cichlid or marine tank. Higher pH, as in African cichlid or reef tanks, converts more of the same ammonia reading into its more toxic un-ionised form, so treat any positive reading in those setups as urgent.\u003c\/p\u003e\n\n\u003ch4\u003eWhat do I do if my test comes back positive?\u003c\/h4\u003e\n\u003cp\u003eCarry out a partial water change and\/or dose an ammonia-neutralising conditioner, then retest to confirm the level is dropping. Persistent ammonia usually points to an incomplete nitrogen cycle, or overstocking and overfeeding, that needs addressing at the source.\u003c\/p\u003e\n\n\u003ch4\u003eHow often should I test?\u003c\/h4\u003e\n\u003cp\u003eThe manufacturer recommends testing every other day while a new aquarium is cycling, until ammonia reads 0 ppm, then testing weekly once the tank is established.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":54774197780771,"sku":null,"price":73.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-quick-testing-strips-amm-46120701034787.webp?v=1790239540"},{"product_id":"api-kh-test-kit-freshwater-saltwater","title":"API KH Hardness Mini Test Kit","description":"\u003cp\u003e\u003cstrong\u003eTracks carbonate hardness — the buffer that keeps pH from crashing.\u003c\/strong\u003e The API KH Test Kit is a liquid reagent test for carbonate hardness (KH), also called alkalinity, in fresh or saltwater. A low KH is one of the most common reasons a stable-looking tank suddenly swings on pH, and this kit is how you catch it before that happens.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrop-count titration\u003c\/strong\u003e — add the reagent drop by drop and count until the colour changes; no colour chart matching required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater\u003c\/strong\u003e — one kit, one reagent, for either water type.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach drop is a known increment\u003c\/strong\u003e — API's KH reagent chemistry is built so one drop equals 1° dKH, giving you a precise number rather than a colour band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTests vary with your water\u003c\/strong\u003e — softer water changes colour in fewer drops, harder water takes more. API does not publish a fixed tests-per-kit count for this reason.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eFill the supplied test tube to the 5 mL line with a water sample.\u003c\/li\u003e\n\u003cli\u003eAdd the KH reagent one drop at a time, swirling the tube after each drop.\u003c\/li\u003e\n\u003cli\u003eCount the drops until the sample's colour changes.\u003c\/li\u003e\n\u003cli\u003eThe number of drops added is your reading in ° dKH.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eCarbonate hardness (KH) \/ alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eDrop-count titration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e1 drop = 1° dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample size\u003c\/th\u003e\n\u003ctd\u003e5 mL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eNot fixed — varies with water hardness; not published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKH reagent bottle\u003c\/li\u003e\n\u003cli\u003eCapped glass test tube\u003c\/li\u003e\n\u003cli\u003eInstruction booklet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA GH (general hardness) reagent — this kit measures KH only. See API GH\/KH Hardness Test Kit for both in one box.\u003c\/li\u003e\n\u003cli\u003eAny product for raising or lowering KH\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater and marine tanks where pH stability is a concern\u003c\/li\u003e\n\u003cli\u003eReef tanks tracking alkalinity alongside calcium and magnesium\u003c\/li\u003e\n\u003cli\u003eDiagnosing unexplained pH drift between water changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasuring general hardness (GH) — a separate reagent is needed for that\u003c\/li\u003e\n\u003cli\u003eAdjusting KH on its own — this kit reads the number, it does not change it\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep out of reach of children.\u003c\/li\u003e\n\u003cli\u003eAvoid skin and eye contact with the reagent; rinse with water if contact occurs.\u003c\/li\u003e\n\u003cli\u003eStore the reagent bottle capped and out of direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-gh-kh-hardness-test-kit\"\u003eAPI GH\/KH Hardness Test Kit\u003c\/a\u003e — adds general hardness (GH) to this kit's KH reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — pairs KH with ammonia, nitrite, nitrate and pH.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy.\u003c\/p\u003e\n\u003cp\u003eShips as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat KH should my tank be?\u003c\/h4\u003e\n\u003cp\u003eAPI does not publish a single target on this kit's own page. As general aquarist reference points rather than an API specification: most community freshwater tanks are commonly kept in the 3–6° dKH range, and harder-water setups such as African cichlid tanks are often kept well above that. Check the requirements for your specific fish or coral rather than relying on a generic figure.\u003c\/p\u003e\n\u003ch4\u003eWhy doesn't API state how many tests are in the kit?\u003c\/h4\u003e\n\u003cp\u003eBecause the test count depends on your water. Every drop is part of one test's worth of reagent, and a harder-water sample needs more drops — and therefore uses more reagent — to reach the colour change than a soft-water sample does.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit test GH as well as KH?\u003c\/h4\u003e\n\u003cp\u003eNo, this is a KH-only kit. API's GH\/KH Hardness Test Kit tests both in the one box, with a separate reagent bottle for each.\u003c\/p\u003e\n\u003ch4\u003eCan I use this in a saltwater reef tank?\u003c\/h4\u003e\n\u003cp\u003eYes, API rates this kit for both freshwater and saltwater, which includes reef tanks tracking alkalinity.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":55242218799395,"sku":"BA9118","price":28.49,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-kh-test-kit-freshwater-s-43877843140899.webp?v=1790239540"},{"product_id":"reefsense-salinity-temperature-probe","title":"ReefSense Salinity \u0026 Temperature Probe","description":"\u003cp\u003e\u003cstrong\u003eSalinity drift is slow, and that's exactly why it's easy to miss.\u003c\/strong\u003e The Red Sea ReefSense Salinity \u0026amp; Temperature Probe tracks both continuously and streams live readings to the ReefBeat app through a ReefControl Lite or Pro controller, so evaporation creep or a heater fault shows up before your livestock feels it. It's an add-on probe — it needs a ReefControl controller to run.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous salinity and temperature\u003c\/strong\u003e — salinity accurate to ±1%, temperature accurate to 0.05°C, read live rather than checked with a refractometer once a week.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-pole conductivity sensor\u003c\/strong\u003e — the same measurement principle behind lab-grade conductivity meters, built into a probe that plugs straight into ReefControl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose your display units\u003c\/strong\u003e — read salinity as PSU (ppt), mS or specific gravity, whichever you already think in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo routine recalibration\u003c\/strong\u003e — Red Sea rates it to hold calibration through normal use; only a clean requires a fresh calibration, and the solution for that is included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrend history and alerts\u003c\/strong\u003e — ReefBeat logs readings over time and can flag you the moment salinity or temperature drifts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRed Sea\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eSalinity and temperature, continuous digital reading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eBA9024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSalinity accuracy\u003c\/th\u003e\n\u003ctd\u003e±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature accuracy\u003c\/th\u003e\n\u003ctd\u003e0.05°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay units\u003c\/th\u003e\n\u003ctd\u003ePSU (ppt), mS or specific gravity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor design\u003c\/th\u003e\n\u003ctd\u003e4-pole conductivity sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnects via\u003c\/th\u003e\n\u003ctd\u003eOne ReefSense port on ReefControl Lite or Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eNot required routinely — only after cleaning, using the included solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e24 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eRed Sea does not publish a stated salinity measurement range for this probe — only the accuracy figure above.\u003c\/p\u003e\n\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\n\u003cp\u003eIn the box: one ReefSense Salinity \u0026amp; Temperature Probe, plus calibration solution for use after cleaning.\u003c\/p\u003e\n\u003cp\u003eNot included: the \u003cstrong\u003eReefControl Lite or Pro\u003c\/strong\u003e controller this probe plugs into and depends on. Without a controller, this probe has no way to display or log a reading.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for marine and reef systems already running, or being set up with, a ReefControl Lite or Pro controller — a reliable second check on top-up and salt-mixing habits.\u003c\/p\u003e\n\u003cp\u003eNot suitable as a handheld spot-check meter — it's a fixed, wired probe for continuous in-tank monitoring, not a portable refractometer replacement for mixing new saltwater.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eUnlike the pH and ORP probes in the ReefSense range, this one is not an electrode-type wear item — it doesn't need routine recalibration. Clean it periodically as biofilm builds up on the sensor face, and recalibrate with the included solution afterwards; otherwise leave it running.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefControl Lite or Pro\u003c\/strong\u003e — the controller this probe requires to operate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefSense pH \u0026amp; Temp Probe\u003c\/strong\u003e and \u003cstrong\u003eReefSense ORP Probe\u003c\/strong\u003e — build a fuller water chemistry picture on the same controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefSense Magnetic 4-Probe Holder\u003c\/strong\u003e — mounts this probe alongside up to three others at a consistent depth.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's 24-month warranty — longer than the 6-month cover on the pH and ORP probes, because this sensor has no wearing electrode — in addition to your rights under Australian Consumer Law. Small, lightweight item — standard parcel delivery.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this probe need recalibrating like the pH probe does?\u003c\/h4\u003e\n\u003cp\u003eNo. It holds its calibration through normal use and only needs recalibrating after you clean it — unlike the pH and ORP probes, which are wear items on a roughly 12-month cycle.\u003c\/p\u003e\n\u003ch4\u003eWhat units can I read salinity in?\u003c\/h4\u003e\n\u003cp\u003ePSU (ppt), mS or specific gravity — pick whichever your existing routine already uses.\u003c\/p\u003e\n\u003ch4\u003eDo I need a ReefControl controller for this to work?\u003c\/h4\u003e\n\u003cp\u003eYes. It plugs into one ReefSense port on a ReefControl Lite or Pro controller and has no independent display of its own.\u003c\/p\u003e\n\u003ch4\u003eWhy does this probe get a longer warranty than the ORP or pH probes?\u003c\/h4\u003e\n\u003cp\u003eIt uses a conductivity sensor rather than a wearing electrode, so Red Sea backs it with the same 24-month warranty as the leak detector, rather than the 6-month wear-item cover on the pH and ORP probes.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242223649059,"sku":"BA9024","price":340.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/reefsense-salinity-temperatu-43138104852771.webp?v=1790230922"},{"product_id":"auto-aqua-digital-inline-tds-titanium-s1","title":"Auto Aqua Digital inline TDS Titanium S1","description":"\u003cp\u003e\u003cstrong\u003eTells you the day your DI resin gives up, not the week after.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe AutoAqua Digital Inline TDS Titanium S1 is a permanently plumbed meter for total dissolved solids (TDS, the mineral load left in your water) on RO and RO\/DI systems. It reads 0 to 999 ppm at 1 ppm resolution with ±2% accuracy through a titanium probe, runs about a year on a single CR2032 cell, and magnet-mounts beside the filter housings. The S1 ships with one union tee, so it monitors one point in the line — decide which point matters most before you cut any tubing.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitanium probe\u003c\/strong\u003e — AutoAqua specifies titanium for corrosion resistance in a fitting that stays wetted permanently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0 to 999 ppm at 1 ppm resolution\u003c\/strong\u003e — fine enough to see DI resin exhausting a single point at a time rather than in a jump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e±2% stated accuracy\u003c\/strong\u003e — close enough that a 3 ppm reading is a real 3 ppm, not rounding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacklit LCD\u003c\/strong\u003e — readable inside a dark cabinet without a torch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto power off after 3 minutes\u003c\/strong\u003e — why one CR2032 lasts about a year on a meter that is always plumbed in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser calibratable\u003c\/strong\u003e — drift can be corrected against a reference rather than replacing the meter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated magnet\u003c\/strong\u003e — sticks to the filter bracket or housing clip, no drilling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement range\u003c\/th\u003e\n\u003ctd\u003e0 to 999 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e1 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e±2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement points\u003c\/th\u003e\n\u003ctd\u003eOne\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe material\u003c\/th\u003e\n\u003ctd\u003eTitanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eBacklit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAuto power off\u003c\/th\u003e\n\u003ctd\u003eAfter 3 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eUser calibratable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eIntegrated magnet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater connection\u003c\/th\u003e\n\u003ctd\u003eQuarter-inch push-connect union tee (one supplied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eCR2032 lithium cell (one supplied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery life\u003c\/th\u003e\n\u003ctd\u003eAbout 1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eTDS-100S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eWhich Titanium do I need?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eUnion tees supplied\u003c\/th\u003e\n\u003cth\u003ePoints monitored at once\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTitanium S1 (TDS-100S)\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTitanium S2 (TDS-200S)\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTitanium S3 (TDS-300S)\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAll three share the same 0 to 999 ppm range, 1 ppm resolution and ±2% accuracy. The only thing that changes is how many places in the line you can read at once. This listing is the S1.\u003c\/p\u003e\n\n\u003ch3\u003eWhere to put the single probe\u003c\/h3\u003e\n\u003cp\u003eBecause the S1 reads one point, where you tee it in decides what the meter can tell you.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter the DI resin\u003c\/strong\u003e — the number your tank actually receives, and the reading that should sit at 0 ppm. This is the usual choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter the RO membrane, before DI\u003c\/strong\u003e — shows membrane performance directly, but says nothing about what finally leaves the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOn the feed line\u003c\/strong\u003e — your starting point. Useful to know once, rarely worth a permanent probe.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you want membrane performance and final product water at the same time, that is two measurement points, which is the S2 rather than the S1.\u003c\/p\u003e\n\n\u003ch3\u003eReading the number\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eWhere you read\u003c\/th\u003e\n\u003cth\u003eWhat the number tells you\u003c\/th\u003e\n\u003cth\u003eWhat a change means\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeed line\u003c\/td\u003e\n\u003ctd\u003eYour incoming supply TDS\u003c\/td\u003e\n\u003ctd\u003eChanges what the membrane has to remove, and shifts seasonally on some supplies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAfter the RO membrane\u003c\/td\u003e\n\u003ctd\u003eHow much the membrane is removing\u003c\/td\u003e\n\u003ctd\u003eExpress it as rejection: (feed minus product) divided by feed, times 100. A falling percentage means the membrane is wearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAfter the DI resin\u003c\/td\u003e\n\u003ctd\u003eThe water your tank receives\u003c\/td\u003e\n\u003ctd\u003eThe DI stage exists to bring this to 0 ppm. Any reading above 0 ppm means the resin is running out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe meter reports the water; it does not schedule your maintenance. What it gives you is the date the number moved.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRO and RO\/DI systems plumbed in quarter-inch push-connect tubing\u003c\/li\u003e\n\u003cli\u003eFreshwater and marine keepers making their own top-off and mixing water\u003c\/li\u003e\n\u003cli\u003eWatching one point continuously instead of dipping a handheld meter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReading aquarium water — a stocked tank, and marine water in particular, sits well above the 999 ppm ceiling\u003c\/li\u003e\n\u003cli\u003eSaltwater lines, for the same reason\u003c\/li\u003e\n\u003cli\u003eAnyone who needs feed and product readings at the same moment — that is the S2\u003c\/li\u003e\n\u003cli\u003eTubing other than quarter-inch push-connect, without an adaptor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTitanium S1 digital inline TDS meter\u003c\/li\u003e\n\u003cli\u003eCR2032 lithium battery x 1\u003c\/li\u003e\n\u003cli\u003eQuarter-inch push-connect union tee x 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRO or RO\/DI filter unit\u003c\/li\u003e\n\u003cli\u003eQuarter-inch RO tubing\u003c\/li\u003e\n\u003cli\u003eAdditional union tees for a second measurement point\u003c\/li\u003e\n\u003cli\u003eCalibration reference solution\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eExpect about a year from the CR2032, helped by the three-minute auto power off. Keep the display body out of direct splash even though the probe itself is titanium. If the reading drifts against a known reference, recalibrate rather than replace.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-mixed-bed-colour-indicating-di-resin\"\u003eReef Pure Mixed Bed Colour Indicating DI Resin\u003c\/a\u003e — the stage the 0 ppm reading is watching\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-reverse-osmosis-membrane\"\u003eReef Pure Reverse Osmosis Membrane\u003c\/a\u003e — what a falling rejection percentage points to\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-4-stage-eddentials\"\u003eReef Pure 4 Stage Essentials+\u003c\/a\u003e — an RO\/DI unit to tee the meter into\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-asov-elctronice-auto-shut-off-valve-for-ro-di\"\u003eAutoAqua Smart ASOV\u003c\/a\u003e — fills the reservoir automatically once you trust the water\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-dc-solenoid-valve\"\u003eAutoAqua DC Solenoid Valve\u003c\/a\u003e — feeds that water straight to a top-off system\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/autoaqua\"\u003eThe full AutoAqua range\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eShips as a standard parcel. Any manufacturer's warranty offered on this meter applies in addition to the consumer guarantees you have under Australian Consumer Law, which cannot be excluded.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes the Titanium S1 read two points at once?\u003c\/h4\u003e\n\u003cp\u003eNo. The AutoAqua Titanium S1 ships with one union tee and monitors a single point in the line. Reading two points at once, such as before and after the DI stage, requires the Titanium S2, which supplies two tees.\u003c\/p\u003e\n\u003ch4\u003eCan it stay plumbed in permanently?\u003c\/h4\u003e\n\u003cp\u003eYes. The probe is titanium for exactly that reason, and the meter powers down after three minutes so a single CR2032 lasts about a year in continuous installation.\u003c\/p\u003e\n\u003ch4\u003eWill it read my aquarium water?\u003c\/h4\u003e\n\u003cp\u003eNo. The meter tops out at 999 ppm, which is a purified-water range. Stocked aquarium water, and marine water especially, reads far above that ceiling.\u003c\/p\u003e\n\u003ch4\u003eWhat battery does it take?\u003c\/h4\u003e\n\u003cp\u003eA single CR2032 lithium cell, one of which is supplied. AutoAqua rates battery life at about one year.\u003c\/p\u003e\n\u003ch4\u003eCan the meter be calibrated?\u003c\/h4\u003e\n\u003cp\u003eYes. The Titanium S1 is user calibratable, so a drifting reading can be corrected against a reference solution instead of replacing the unit.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":55242230595875,"sku":"BA8861","price":89.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/auto-aqua-digital-inline-tds-43508248314147.webp?v=1790234084"},{"product_id":"seachem-ph-alkalinity-kit-75-tests","title":"Seachem pH \u0026 Alkalinity Kit 75 Tests","description":"\u003cp\u003e\u003cstrong\u003eA precise liquid test for the two numbers that matter most in a reef system: pH and total alkalinity.\u003c\/strong\u003e The Seachem MultiTest Marine pH \u0026amp; Alkalinity kit gives you over 75 tests from one kit, using liquid reagents and a colour chart calibrated specifically for marine and brackish water. It is not a freshwater kit — the colour range is built around the 7.80–8.70 pH band and the alkalinity levels typical of reef and marine systems.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e75+ tests per kit\u003c\/strong\u003e — two parameters, one box, no need to buy pH and alkalinity separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH range 7.80–8.70\u003c\/strong\u003e — read to 0.01 pH unit increments against the colour chart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal alkalinity, 0.5 meq\/L resolution\u003c\/strong\u003e — measures carbonate, bicarbonate, borate and hydroxide content together as total alkalinity, with no fixed upper limit on range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference samples included\u003c\/strong\u003e — check your own colour matching against a known reference before you trust a borderline reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 cm viewing window\u003c\/strong\u003e — the colour chart is designed to isolate the sample colour from ambient light interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine and brackish only\u003c\/strong\u003e — not formulated or calibrated for freshwater aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003ctd\u003eMultiTest: Marine pH \u0026amp; Alkalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003e75+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and brackish only — not for freshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003epH range\u003c\/th\u003e\n\u003ctd\u003e7.80–8.70\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003epH resolution\u003c\/th\u003e\n\u003ctd\u003e0.01 pH unit increments on the colour chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlkalinity range\u003c\/th\u003e\n\u003ctd\u003e0 meq\/L upward, no fixed ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlkalinity resolution\u003c\/th\u003e\n\u003ctd\u003e0.5 meq\/L increments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlkalinity measured\u003c\/th\u003e\n\u003ctd\u003eTotal alkalinity — carbonate, bicarbonate, borate and hydroxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eLiquid reagent, colour comparison against printed chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eAA1116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e116094009\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMarine pH reagent\u003c\/li\u003e\n\u003cli\u003eAlkalinity reagent\u003c\/li\u003e\n\u003cli\u003epH and alkalinity reference solutions\u003c\/li\u003e\n\u003cli\u003eAlkalinity pipette and sample pipette\u003c\/li\u003e\n\u003cli\u003eStir rod\u003c\/li\u003e\n\u003cli\u003eColour comparison chart with 5 cm viewing window\u003c\/li\u003e\n\u003cli\u003eMulti-cavity test plate\u003c\/li\u003e\n\u003cli\u003eInstructions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTarget ranges\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eNatural seawater\u003c\/th\u003e\n\u003cth\u003eReef target\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003ctd\u003e8.2–8.4 typical\u003c\/td\u003e\n\u003ctd\u003e8.2–8.4 (up to 8.6 with limewater\/kalkwasser dosing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlkalinity\u003c\/td\u003e\n\u003ctd\u003e2–3 meq\/L\u003c\/td\u003e\n\u003ctd\u003e4–6 meq\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef tanks, FOWLR systems, brackish setups, anyone dosing kalkwasser, buffers or calcium and needing to track the knock-on effect on pH and alkalinity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums — the colour range and reagents are calibrated for marine chemistry and won't give a meaningful reading in freshwater. Use a freshwater-specific test kit instead.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eStore reagents away from direct sunlight and heat, and keep the cap on the reagent bottles between tests to protect shelf life. Rinse the test plate and pipettes after each use to avoid cross-contaminating future readings.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by Seachem's standard quality guarantee at the time of sale, in addition to your rights under Australian Consumer Law. Ships as a standard parcel.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eCan I use this kit on a freshwater tank?\u003c\/h4\u003e\u003cp\u003eNo. This is the marine and brackish formulation — the reagents and colour chart are calibrated to the 7.80–8.70 pH band typical of saltwater, not freshwater ranges.\u003c\/p\u003e\u003ch4\u003eHow many tests will I actually get from one kit?\u003c\/h4\u003e\u003cp\u003eSeachem states over 75 tests per kit, covering both pH and alkalinity across the reagents supplied.\u003c\/p\u003e\u003ch4\u003eWhat does “total alkalinity” mean here, versus just carbonate hardness?\u003c\/h4\u003e\u003cp\u003eTotal alkalinity (KH) as measured by this kit includes the combined buffering contribution of carbonate, bicarbonate, borate and hydroxide — a fuller picture than a carbonate-only reading.\u003c\/p\u003e\u003ch4\u003eWhy is there no upper limit on the alkalinity range?\u003c\/h4\u003e\u003cp\u003eThe test works by titration in 0.5 meq\/L steps, so it can keep reading upward rather than being capped at a fixed maximum — useful if your alkalinity has drifted higher than expected.\u003c\/p\u003e\u003ch4\u003eDo I need a separate reference solution to trust my results?\u003c\/h4\u003e\u003cp\u003eNot strictly, but the kit includes pH and alkalinity reference samples so you can validate your technique and colour perception against a known value before relying on a borderline reading.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":55242261397795,"sku":"AA1116","price":29.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-ph-alkalinity-kit-75-43160355766563.webp?v=1790231147"},{"product_id":"seachem-nitirite-nitrate-kit-75-tests","title":"Seachem Nitrite \u0026 Nitrate Kit 75 Tests","description":"\u003cp\u003e\u003cstrong\u003eTwo of the most important numbers in a cycling or established tank, from one kit.\u003c\/strong\u003e Seachem MultiTest Nitrite \u0026amp; Nitrate covers both parameters in a single 75+ test kit, reading nitrite from 0–25 mg\/L (detecting below 0.1 mg\/L) and nitrate from 0–50 mg\/L (detecting below 0.2 mg\/L), in fresh or marine water.\u003c\/p\u003e\n\u003ch3\u003eWhy test both together\u003c\/h3\u003e\n\u003cp\u003eNitrite is the acute danger — it spikes during a tank's cycling phase and after a sudden bioload increase, and it's directly toxic to fish at low concentrations. Nitrate is the chronic, slow-building number that tells you how well water changes and filtration are keeping pace with waste. Testing only one gives half the picture; this kit reads both from the same test plate.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver 75 tests per kit\u003c\/strong\u003e — around 39c per test at full retail price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrite range 0–25 mg\/L\u003c\/strong\u003e, detecting changes below 0.1 mg\/L.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNitrate range 0–50 mg\/L\u003c\/strong\u003e, detecting changes below 0.2 mg\/L, with colour-chart steps of 0.1–1 mg\/L.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix-cavity test plate\u003c\/strong\u003e — compare up to six samples side by side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReference sample included\u003c\/strong\u003e to check the kit is reading correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and marine\u003c\/strong\u003e — one kit for the whole store's tank types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003e75+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNitrite range\u003c\/th\u003e\n\u003ctd\u003e0–25 mg\/L, detects \u0026lt;0.1 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNitrate range\u003c\/th\u003e\n\u003ctd\u003e0–50 mg\/L, detects \u0026lt;0.2 mg\/L, 0.1–1 mg\/L chart steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCost per test\u003c\/th\u003e\n\u003ctd\u003e39c per test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU \/ Barcode\u003c\/th\u003e\n\u003ctd\u003eAA1114 \/ 000116096003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNitrite Reagent 1\u003c\/li\u003e\n\u003cli\u003eNitrate Reagent 2\u003c\/li\u003e\n\u003cli\u003eNitrate reference sample\u003c\/li\u003e\n\u003cli\u003eSample pipette and spoon\u003c\/li\u003e\n\u003cli\u003eNitrite\/nitrate colour chart\u003c\/li\u003e\n\u003cli\u003eMulti-cavity test plate and instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDirections\u003c\/h3\u003e\n\u003cp\u003eDose a water sample with the nitrite reagent and read against the nitrite side of the colour chart, then dose a separate sample with the nitrate reagent and read against the nitrate side. Run the included reference sample alongside a tank sample whenever a result looks unexpectedly high or low, to confirm the kit itself is reading correctly. Store reagents cool and out of direct light between uses.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e new tanks being cycled, where nitrite is the number to watch daily, and established tanks tracking nitrate build-up between water changes. Works in both freshwater and marine setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e nitrate testing in heavily-stocked reef tanks running consistently near zero, where a lower-range, finer-resolution reef nitrate kit will read more precisely than this general-purpose kit's 0.1–1 mg\/L steps.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep away from children. Handle reagents carefully and avoid skin and eye contact — rinse thoroughly with water if contact occurs.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-multitest-ammonia-75-tests\"\u003eSeachem MultiTest Ammonia\u003c\/a\u003e — the third leg of the nitrogen cycle, and essential during tank cycling alongside nitrite.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-multitest-phosphate-75-tests\"\u003eSeachem MultiTest Phosphate\u003c\/a\u003e — rounds out a full nutrient picture for algae control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eShips as a standard parcel. Store reagents cool and dark between uses. Covered by the consumer guarantees under Australian Consumer Law in addition to Seachem's own guarantee.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDo I need to test nitrite and nitrate separately, or does one test cover both?\u003c\/h4\u003e\n\u003cp\u003eThey're separate readings from the same kit — dose one sample with the nitrite reagent and a second sample with the nitrate reagent, then read each against its own side of the colour chart.\u003c\/p\u003e\n\u003ch4\u003eWhy is nitrite more urgent to watch than nitrate?\u003c\/h4\u003e\n\u003cp\u003eNitrite is directly toxic to fish at low concentrations and spikes suddenly during cycling or after a bioload increase. Nitrate builds up slowly and is managed with routine water changes rather than requiring an emergency response.\u003c\/p\u003e\n\u003ch4\u003eIs this kit accurate enough for a low-nutrient reef tank?\u003c\/h4\u003e\n\u003cp\u003eIt's a general-purpose kit with 0.1–1 mg\/L nitrate chart steps, which is coarser than dedicated low-range reef nitrate kits. It's well suited to fresh and marine tanks generally, but a reef-specific kit will read more precisely near zero.\u003c\/p\u003e\n\u003ch4\u003eHow many tests do I actually get?\u003c\/h4\u003e\n\u003cp\u003eOver 75, at around 39c per test, covering both nitrite and nitrate readings.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit during fishless cycling?\u003c\/h4\u003e\n\u003cp\u003eYes — it's well suited to tracking the nitrite spike and the appearance of nitrate that marks a tank's nitrogen cycle progressing.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"Default Title","offer_id":55242264248611,"sku":"AA1114","price":29.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/seachem-nitirite-nitrate-kit-43160355799331.webp?v=1790231147"},{"product_id":"triton-lab-icp-oes-test","title":"Triton Lab ICP-OES Test","description":"\u003cp\u003e\u003cstrong\u003eA lab-grade water analysis that measures far more than a home test kit can.\u003c\/strong\u003e The Triton ICP-OES test sends a sample of your aquarium water to a TRITON laboratory for professional ICP-OES analysis, covering major and trace elements, unwanted metals and nutrients that a colour-based home kit doesn't reach.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSend-away lab analysis\u003c\/strong\u003e — uses ICP-OES (inductively coupled plasma optical emission spectrometry), the same technology used in professional water labs, not a hobby colour chart.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParts-per-billion precision\u003c\/strong\u003e — far finer resolution than a home test kit can read.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad element coverage\u003c\/strong\u003e — macro elements, trace elements, unwanted metals, nutrients and salinity, grouped in your results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePersonalised recommendations\u003c\/strong\u003e — TRITON returns dosing guidance alongside your raw results.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eTriton Lab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest type\u003c\/th\u003e\n\u003ctd\u003eSend-away ICP-OES water analysis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter groups\u003c\/th\u003e\n\u003ctd\u003eMacro elements, trace elements, unwanted metals, nutrients, salinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrecision\u003c\/th\u003e\n\u003ctd\u003eParts-per-billion (ppb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTurnaround\u003c\/th\u003e\n\u003ctd\u003eTriton states results within 1–3 business days of the sample reaching the lab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample required\u003c\/th\u003e\n\u003ctd\u003eOne vial of aquarium water, collected and sealed as supplied in the kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitability\u003c\/th\u003e\n\u003ctd\u003eMarine and reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch4\u003eWhat's measured\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eGroup\u003c\/th\u003e\n\u003cth\u003eExamples Triton names\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMacro elements\u003c\/td\u003e\n\u003ctd\u003eCalcium, magnesium, potassium, strontium, boron, sodium, sulphur, bromide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrace elements\u003c\/td\u003e\n\u003ctd\u003eIron, iodine, manganese, zinc, vanadium, molybdenum, cobalt, lithium, barium, chromium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnwanted metals\u003c\/td\u003e\n\u003ctd\u003eCopper, lead, tin, aluminium, nickel, cadmium, arsenic, mercury\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNutrients\u003c\/td\u003e\n\u003ctd\u003ePhosphorus and phosphate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther\u003c\/td\u003e\n\u003ctd\u003eSalinity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eTriton's own published copy gives slightly different total parameter counts on different pages — we've seen both \"41+\" and \"45\" quoted. We're publishing the category breakdown above rather than a headline total we can't verify precisely.\u003c\/p\u003e\u003ch3\u003eHow the test works\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eRegister the kit's barcode on the TRITON website.\u003c\/li\u003e\n\u003cli\u003eRinse the supplied vial in your aquarium, away from the surface and any return pump outlet, then fill and seal it.\u003c\/li\u003e\n\u003cli\u003ePost the sealed sample to your nearest TRITON laboratory using the materials supplied with the kit.\u003c\/li\u003e\n\u003cli\u003eTRITON emails you when the sample arrives, and again once results and dosing recommendations are ready — typically 1–3 business days after arrival.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e marine and reef aquariums where you want a full elemental picture beyond what a colour-based home kit can show.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums, and it isn't a same-day result — treat it as a periodic health check rather than a tool for reacting to a problem today.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriton N-DOC test\u003c\/strong\u003e — covers dissolved organic carbon and nitrogen, which ICP-OES doesn't measure, worth running alongside ICP-OES if algae or coral performance issues persist despite normal ICP results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA dosing pump or dosing container\u003c\/strong\u003e — to act on the trace element recommendations TRITON returns with your results.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eThis is a single-use test kit and diagnostic service rather than a physical product with a warranty; your rights under Australian Consumer Law apply regardless. Postage to the TRITON lab is at your own cost and separate from delivery of the kit itself.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow many elements does the ICP-OES test cover?\u003c\/h4\u003e\u003cp\u003eTRITON groups the results into macro elements, trace elements, unwanted metals, nutrients and salinity. TRITON's own published totals vary between \"41+\" and \"45\" parameters, so we're not quoting a single precise figure we can't confirm.\u003c\/p\u003e\u003ch4\u003eHow long do results take?\u003c\/h4\u003e\u003cp\u003eTRITON states results are typically ready within 1–3 business days of your sample arriving at the lab, plus the time your sample spends in the post.\u003c\/p\u003e\u003ch4\u003eDoes this test replace my regular test kit?\u003c\/h4\u003e\u003cp\u003eNo — it's a periodic deep check rather than a day-to-day tool. Keep using a home test kit for parameters you need to monitor between ICP tests, such as alkalinity, calcium and magnesium.\u003c\/p\u003e\u003ch4\u003eIs there a cost-per-litre figure for this test?\u003c\/h4\u003e\u003cp\u003eNo — ICP-OES testing is diagnostic only and doesn't dose or treat your tank, so there's no volume of water it \"makes\" or conditions. The cost is per test, not per litre.\u003c\/p\u003e\u003ch4\u003eDo I need an account to use this kit?\u003c\/h4\u003e\u003cp\u003eYes — TRITON's process requires registering the kit's barcode on their website before you post your sample.\u003c\/p\u003e","brand":"Triton Lab","offers":[{"title":"Default Title","offer_id":55242285777187,"sku":"AA03425","price":63.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/triton-lab-icp-oes-test-43106795979043.webp?v=1790233227"},{"product_id":"triton-lab-n-doc-organic-ipc-test","title":"Triton Lab N-Doc Organic IPC Test","description":"\u003cp\u003e\u003cstrong\u003eA lab test for the organic load and extended alkalinity picture a standard ICP panel misses.\u003c\/strong\u003e The Triton N-DOC test analyses dissolved organic carbon, nitrogen and extended alkalinity in a sent-away water sample, aimed at reef tanks where algae or coral performance issues persist despite otherwise normal water parameters.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFills a gap standard ICP testing leaves\u003c\/strong\u003e — measures organic carbon and nitrogen, which a standard elemental ICP-OES panel doesn't cover.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended alkalinity reading included\u003c\/strong\u003e — alongside the organics, for a fuller alkalinity picture than a hobby kit gives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAimed at unexplained problems\u003c\/strong\u003e — TRITON recommends it when normal-looking water chemistry doesn't match what you're seeing in the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLab-processed, not a home colour test\u003c\/strong\u003e — samples are analysed at a TRITON laboratory, not read against a chart at home.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eTriton Lab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest type\u003c\/th\u003e\n\u003ctd\u003eSend-away seawater organics and alkalinity analysis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameters measured\u003c\/th\u003e\n\u003ctd\u003eTotal nitrogen (TNb), dissolved\/total organic carbon (TOC), extended alkalinity (TIC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSample required\u003c\/th\u003e\n\u003ctd\u003eTwo vials, each filled three times with aquarium water, as supplied in the kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSuitability\u003c\/th\u003e\n\u003ctd\u003eMarine and reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat it measures, and why\u003c\/h3\u003e\u003cp\u003eTRITON describes N-DOC as filling a gap in standard reef testing: it measures the dissolved organic carbon (TOC) and nitrogen (TNb) that standard hobby test kits don't reach, alongside an extended alkalinity (TIC) reading. TRITON's own guidance flags TOC above roughly 3.5 ppm as a level worth addressing, since elevated organic carbon is linked to bacterial and algae blooms.\u003c\/p\u003e\u003cp\u003eTRITON recommends this test specifically when your regular ICP results look normal but corals are still underperforming, or when algae problems persist despite otherwise stable water chemistry — situations a standard elemental panel won't explain.\u003c\/p\u003e\u003ch3\u003eHow the test works\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eRegister your kit and its barcodes on the TRITON website.\u003c\/li\u003e\n\u003cli\u003eFill the two supplied vials with aquarium water, three fills each, as instructed in the kit.\u003c\/li\u003e\n\u003cli\u003eSeal the vials, attach the barcodes, and pack them in the return packaging.\u003c\/li\u003e\n\u003cli\u003ePost the sample to your nearest TRITON laboratory. TRITON emails you when the sample arrives and again once results are ready.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eExact postage and the receiving lab address depend on where you register the kit — follow the instructions included with your specific kit rather than an address printed elsewhere, since TRITON routes samples to different regional labs.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e marine and reef aquariums, particularly where algae or coral health issues persist despite normal-looking ICP results.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e freshwater aquariums, and it isn't a substitute for a full ICP-OES elemental panel — the two tests measure different things.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriton ICP-OES test\u003c\/strong\u003e — covers the major, trace and unwanted-metal elements this test doesn't, for a complete water picture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActivated carbon or a protein skimmer upgrade\u003c\/strong\u003e — common next steps if your TOC result comes back elevated.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eThis is a single-use test kit and diagnostic service rather than a physical product with a warranty; your rights under Australian Consumer Law apply regardless. Postage to the TRITON lab is separate from delivery of the kit.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhat's the difference between this and the ICP-OES test?\u003c\/h4\u003e\u003cp\u003eICP-OES measures elements — calcium, magnesium, trace elements and unwanted metals. N-DOC measures organic carbon, nitrogen and extended alkalinity instead, which ICP-OES doesn't cover.\u003c\/p\u003e\u003ch4\u003eWhen should I run this test instead of, or alongside, ICP-OES?\u003c\/h4\u003e\u003cp\u003eTRITON recommends it when ICP results look normal but corals are underperforming, or when algae keeps coming back despite stable water chemistry.\u003c\/p\u003e\u003ch4\u003eWhat does a high TOC reading mean?\u003c\/h4\u003e\u003cp\u003eTRITON flags dissolved organic carbon above roughly 3.5 ppm as a level worth addressing, since it's linked to bacterial and algae growth.\u003c\/p\u003e\u003ch4\u003eIs there a cost-per-litre figure for this test?\u003c\/h4\u003e\u003cp\u003eNo — like the ICP-OES test, this is diagnostic only and doesn't dose or treat your tank, so there's no volume of water it treats. The cost is per test.\u003c\/p\u003e\u003ch4\u003eHow many water samples do I need to send?\u003c\/h4\u003e\u003cp\u003eThe kit includes two vials, each filled three times with aquarium water, following the instructions supplied.\u003c\/p\u003e","brand":"Triton Lab","offers":[{"title":"Default Title","offer_id":55242285809955,"sku":"AA0343","price":63.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/triton-lab-n-doc-organic-ipc-43106796011811.webp?v=1790233227"},{"product_id":"api-gh-and-kh-test-kit","title":"API GH\/KH Hardness Test Kit","description":"\u003cp\u003e\u003cstrong\u003eMeasures the two hardness numbers that decide how stable your pH will be.\u003c\/strong\u003e The API GH and KH Test Kit reads General Hardness (calcium and magnesium) and Carbonate Hardness (carbonate and bicarbonate, your tank's pH buffer) by drop-count titration — two reagent bottles, two glass test tubes, one instruction sheet.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo parameters, one kit\u003c\/strong\u003e — GH and KH each get their own dedicated reagent bottle and test tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTitration method, not a fixed test count\u003c\/strong\u003e — you count drops until the colour changes, so soft water uses fewer drops per test than hard water. See the note below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResults in degrees\u003c\/strong\u003e — read as °dGH and °dKH, with a conversion note in the instructions for converting to ppm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and saltwater\u003c\/strong\u003e — the same reagents work for both.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eKH test:\u003c\/strong\u003e fill a test tube with a 5 mL water sample, add the KH solution one drop at a time, capping and inverting after each drop, and counting as you go. The test is complete when the sample changes from blue to yellow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGH test:\u003c\/strong\u003e fill a test tube with a 5 mL water sample, add the GH solution one drop at a time, capping and inverting after each drop, and counting as you go. The test is complete when the sample changes from orange to green.\u003c\/p\u003e\n\u003cp\u003eThe number of drops needed is the reading — each drop typically represents one degree of hardness, per the conversion chart printed in the instructions.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003eGeneral Hardness (GH) and Carbonate Hardness (KH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eLiquid reagent, drop-count titration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUnits\u003c\/th\u003e\n\u003ctd\u003eDegrees (°dGH \/ °dKH), convertible to ppm via the printed chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eNot a fixed number — varies with water hardness, see below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eAA2295\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e317163010587\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhy there's no fixed test count\u003c\/h3\u003e\n\u003cp\u003eUnlike API's colour-match kits, this is a titration test: you add reagent drop by drop until the colour flips, and the drop count itself is the reading. That means a soft-water tank (fewer drops needed) gets more tests out of the same bottle than a very hard-water tank (more drops needed per test). API does not publish a fixed test count for this reason, and quoting one would misrepresent how the kit works — so we haven't.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eKH test reagent bottle\u003c\/li\u003e\n\u003cli\u003eGH test reagent bottle\u003c\/li\u003e\n\u003cli\u003eTwo glass test tubes with caps\u003c\/li\u003e\n\u003cli\u003eInstruction sheet with degree-to-ppm conversion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA printed colour chart — this kit reads by drop count and colour change, not a comparison card\u003c\/li\u003e\n\u003cli\u003eAnything to raise or lower hardness — test only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater and saltwater aquariums where GH and KH need tracking — planted tanks, shrimp tanks, African cichlids and reef systems all care about this pair\u003c\/li\u003e\n\u003cli\u003eDiagnosing pH instability — a low KH reading usually explains a pH that won't hold steady\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCorrecting hardness — this kit measures only\u003c\/li\u003e\n\u003cli\u003eColour-blind users without assistance — the endpoint is a colour change, so a second person or a well-lit comparison helps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep out of reach of children.\u003c\/li\u003e\n\u003cli\u003eAvoid eye and skin contact with the reagents; rinse well with water if contact occurs.\u003c\/li\u003e\n\u003cli\u003eShake reagent bottles vigorously before use, and keep the cap closed tight while shaking.\u003c\/li\u003e\n\u003cli\u003eRinse test tubes immediately after each test to stop reagent residue staining the glass.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-ph-test-kit\"\u003eAPI Freshwater pH Test Kit\u003c\/a\u003e — KH is what keeps a pH reading stable between tests, so the two go together.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-deluxe-ph-test-kit-with-liquid-adjusters\"\u003eAPI Deluxe pH Test Kit with Liquid Adjusters\u003c\/a\u003e — check KH before repeatedly dosing a pH adjuster into a tank that keeps drifting back.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — rounds out your routine testing with ammonia, nitrite and nitrate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhy does this kit measure in drops instead of giving me a test count?\u003c\/h4\u003e\n\u003cp\u003eBecause it's a titration test — you add reagent until the colour changes, and the number of drops is the answer. Harder water needs more drops per test, so the exact number of tests you'll get from a bottle depends on your own water, not a fixed figure API can print.\u003c\/p\u003e\n\u003ch4\u003eWhat's the difference between GH and KH?\u003c\/h4\u003e\n\u003cp\u003eGeneral Hardness (GH) measures dissolved calcium and magnesium — the minerals many fish and plants need. Carbonate Hardness (KH) measures carbonate and bicarbonate, which buffer pH and stop it swinging with every water change or CO2 dose.\u003c\/p\u003e\n\u003ch4\u003eMy KH reads very low. Does that matter?\u003c\/h4\u003e\n\u003cp\u003eYes — low KH means little buffering capacity, so pH can swing quickly with small changes in the tank. If you're also seeing pH drift, low KH is often the underlying cause.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit work for saltwater and reef tanks too?\u003c\/h4\u003e\n\u003cp\u003eAPI rates the reagents for both fresh and saltwater, though reef keepers chasing precise alkalinity for coral growth often prefer a dedicated marine alkalinity test alongside this one.\u003c\/p\u003e\n\u003ch4\u003eHow do I convert degrees to ppm?\u003c\/h4\u003e\n\u003cp\u003eThe instruction sheet included in the box carries a conversion table from °dGH\/°dKH to ppm. We haven't reprinted the exact conversion figures here, since we could not independently verify them from API's own published documentation.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":55242285842723,"sku":"AA2295","price":36.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-gh-and-kh-test-kit-46120701100323.webp?v=1790239781"},{"product_id":"api-quick-testing-strips-5-in-1-4-pack","title":"API Quick Testing Strips 5 in 1 - 4 pack","description":"\u003cp\u003e\u003cstrong\u003eFive readings, one dip, four strips to try it.\u003c\/strong\u003e API 5-in-1 Test Strips read pH, KH, GH, nitrite and nitrate from a single dip in under a minute. This 4-strip pack is the trial size — enough for a first look at a new tank, or to try the format before buying the 25-count tube.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive parameters in one dip\u003c\/strong\u003e — pH, carbonate hardness (KH), general hardness (GH), nitrite and nitrate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResults in under a minute\u003c\/strong\u003e — GH and KH read immediately, pH, nitrite and nitrate after 30 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo drops or vials\u003c\/strong\u003e — dip, swirl, read against the chart on the tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFresh and saltwater\u003c\/strong\u003e — pH, nitrite and nitrate are calibrated for both; GH and KH are freshwater figures (see below).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 strips per pack, about $5.16 per test\u003c\/strong\u003e — the 25-count tube works out considerably cheaper per test for anyone testing regularly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDip the strip into the aquarium and swirl twice.\u003c\/li\u003e\n\u003cli\u003eRemove horizontally, pads facing up, without shaking off the water.\u003c\/li\u003e\n\u003cli\u003eRead GH and KH immediately.\u003c\/li\u003e\n\u003cli\u003eWait 30 seconds, then read pH, nitrite and nitrate.\u003c\/li\u003e\n\u003cli\u003eCompare each pad to the colour chart on the tube, in good light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH, KH, GH, nitrite, nitrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003epH range\u003c\/th\u003e\n\u003ctd\u003e6.0 – 9.0 (fresh and saltwater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKH range\u003c\/th\u003e\n\u003ctd\u003e0 – 240 ppm (freshwater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGH range\u003c\/th\u003e\n\u003ctd\u003e0 – 180 ppm (freshwater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNitrite range\u003c\/th\u003e\n\u003ctd\u003e0 – 10 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNitrate range\u003c\/th\u003e\n\u003ctd\u003e0 – 200 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003eImmediate (GH, KH); 30 seconds (pH, nitrite, nitrate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per pack\u003c\/th\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e a quick first check on a new or unfamiliar tank, or trying the 5-in-1 format before committing to a bigger pack.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e a routine weekly testing schedule — four strips run out fast. See \u003ca href=\"\/products\/api-quick-testing-strips-5-in1-25-pack\"\u003eAPI 5-in-1 Test Strips, 25 pack\u003c\/a\u003e for ongoing use, or \u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit\u003c\/a\u003e for lab-grade liquid results on the same five parameters.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eIs this the same test as the 25-pack?\u003c\/h4\u003e\n\u003cp\u003eYes — identical strips and parameters, just four to a pack instead of 25.\u003c\/p\u003e\n\u003ch4\u003eDo the GH and KH readings work in saltwater?\u003c\/h4\u003e\n\u003cp\u003eNo. API calibrates the GH and KH pads on this strip for freshwater. In saltwater, rely on pH, nitrite and nitrate from this strip and use a dedicated salinity and alkalinity test for hardness.\u003c\/p\u003e\n\u003ch4\u003eIs nitrite zero always the target?\u003c\/h4\u003e\n\u003cp\u003eYes — in an established, cycled aquarium nitrite should read zero. Any reading above that points to an incomplete nitrogen cycle or overstocking.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":55242294493475,"sku":"BA2035","price":20.65,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-quick-testing-strips-5-i-43875857006883.webp?v=1790239780"},{"product_id":"api-quick-testing-strips-p-h","title":"API Quick Testing Strips - P.H.","description":"\u003cp\u003e\u003cstrong\u003eOne dip tells you where your tank's pH sits.\u003c\/strong\u003e API pH Test Strips give a fast, no-drops read on pH in fresh or saltwater aquariums — dip, wait 30 seconds, and match the strip to the colour chart. Each tube holds 25 strips, enough for roughly six months of weekly testing.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReads pH 6.0 to 9.0\u003c\/strong\u003e — covers the working range from community freshwater tanks through to reef and marine systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo drops, no vials\u003c\/strong\u003e — dip the strip, swirl, remove and read.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResult in 30 seconds\u003c\/strong\u003e — no waiting on a colour to slowly develop in a test tube.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 strips per tube\u003c\/strong\u003e — a desiccant-lined tube keeps the unused strips dry between tests.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 92c per test\u003c\/strong\u003e — the price tile below is computed live from the current price, so it always matches what's on the page.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDip the strip into the aquarium and swirl twice.\u003c\/li\u003e\n\u003cli\u003eRemove it horizontally, pads facing up. Don't shake off the water.\u003c\/li\u003e\n\u003cli\u003eWait 30 seconds.\u003c\/li\u003e\n\u003cli\u003eCompare the pad to the colour chart on the tube, in good light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e6.0 to 9.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API — read against the printed colour chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003e30 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per tube\u003c\/th\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eTarget pH ranges\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eTarget pH\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunity freshwater\u003c\/td\u003e\n\u003ctd\u003e6.8 – 7.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmazonian \/ soft-water species\u003c\/td\u003e\n\u003ctd\u003e6.5 – 6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGoldfish\u003c\/td\u003e\n\u003ctd\u003earound 7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAfrican cichlids\u003c\/td\u003e\n\u003ctd\u003e8.2 or higher\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSaltwater \/ reef\u003c\/td\u003e\n\u003ctd\u003e8.2 – 8.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThese are API's general guidelines, not a hard target for every species in every group — a fish kept well outside its wild range can still be healthy if it's what the fish was bred into. A sudden swing matters more than sitting slightly off the number.\u003c\/p\u003e\n\n\u003ch3\u003eWhen the reading is out of range\u003c\/h3\u003e\n\u003cp\u003eA pH strip tells you where you are, not why. Falling pH is normal in an established freshwater tank as buffering capacity (KH) is used up — \u003ca href=\"\/products\/api-quick-testing-strips-5-in-1-4-pack\"\u003eAPI's 5-in-1 strips\u003c\/a\u003e read KH alongside pH so you can see the cause. A pH swing in a new tank often points to an unfinished nitrogen cycle — \u003ca href=\"\/products\/api-quick-start\"\u003eAPI Quick Start\u003c\/a\u003e seeds the bacteria that stabilises it.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWeekly screening of freshwater and saltwater aquariums\u003c\/li\u003e\n\u003cli\u003eSpotting a pH swing before it stresses fish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision reef dosing, where a liquid or digital pH test gives a finer readout\u003c\/li\u003e\n\u003cli\u003eDiagnosing why pH has moved — pair with a KH test to see the buffering picture\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests are in one tube?\u003c\/h4\u003e\n\u003cp\u003e25 strips, each reading pH only.\u003c\/p\u003e\n\u003ch4\u003eDoes this work for saltwater and reef tanks?\u003c\/h4\u003e\n\u003cp\u003eYes — the 6.0–9.0 range covers reef and marine pH as well as freshwater.\u003c\/p\u003e\n\u003ch4\u003eHow long does the tube last once opened?\u003c\/h4\u003e\n\u003cp\u003eAPI doesn't publish a specific open-tube shelf life for this product; store it capped, away from moisture and heat, and don't use a strip that looks discoloured before dipping.\u003c\/p\u003e\n\u003ch4\u003eShould I use this instead of the 5-in-1 strips?\u003c\/h4\u003e\n\u003cp\u003eOnly if you specifically want pH and nothing else — the 5-in-1 strips read pH plus KH, GH, nitrite and nitrate from the same dip for a similar price.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":55242294559011,"sku":"BA2029","price":23.13,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-quick-testing-strips-p-h-46120701165859.webp?v=1790239782"},{"product_id":"api-freshwater-ph-test-kit","title":"API Freshwater Mini pH Test Kit","description":"\u003cp\u003e\u003cstrong\u003eReads pH from 6.0 to 9.0, wide enough for a soft planted tank or a hard-water African cichlid setup.\u003c\/strong\u003e The API Freshwater pH Test Kit is a liquid reagent test for tracking pH in a freshwater aquarium. It ships as a 4-piece set: one reagent bottle, a glass test tube, a printed colour chart and an instruction booklet, good for approximately 250 tests.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range, 6.0–9.0\u003c\/strong\u003e — covers soft-water species through to hard, alkaline African cichlid tanks in one kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid reagent, not strips\u003c\/strong\u003e — a drop-count colour test that API rates as more precise than paper test strips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbout 250 tests per kit\u003c\/strong\u003e — cents per test across a typical fishkeeping year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResult in about a minute\u003c\/strong\u003e — fill, dose, shake, compare against the printed card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable glass test tube\u003c\/strong\u003e — rinse after each use rather than replacing it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003eFill the supplied test tube with an aquarium water sample to the marked line, add the indicator solution from the bottle as directed on the label, cap and invert gently to mix, then compare the resulting colour against the printed chart in good light. Rinse the test tube immediately after reading so reagent residue doesn't stain the glass over time.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eAPI (Mars Fishcare)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003ctd\u003epH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRange\u003c\/th\u003e\n\u003ctd\u003e6.0 to 9.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003eNot published by API\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003ctd\u003eLiquid reagent, drop-count colour comparison\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTime to result\u003c\/th\u003e\n\u003ctd\u003eAbout 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests per kit\u003c\/th\u003e\n\u003ctd\u003eApproximately 250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eBA1997\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFreight\u003c\/th\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003epH indicator reagent bottle\u003c\/li\u003e\n\u003cli\u003eGlass test tube\u003c\/li\u003e\n\u003cli\u003ePrinted colour comparison chart\u003c\/li\u003e\n\u003cli\u003eInstruction booklet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAnything to correct a wrong reading — pair it with a pH adjuster kit if you expect to need to move pH, not just measure it\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTarget pH by fish type\u003c\/h3\u003e\n\u003cp\u003ePer API's published guidance, these are typical targets rather than fixed rules — a stable pH your fish are already established in usually beats chasing a textbook number:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSetup\u003c\/th\u003e\n\u003cth\u003eTypical target pH\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunity tropical\u003c\/td\u003e\n\u003ctd\u003eAround 7.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGoldfish and livebearers\u003c\/td\u003e\n\u003ctd\u003eAround 7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAngelfish and neon tetras\u003c\/td\u003e\n\u003ctd\u003e6.5–6.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMollies and swordtails\u003c\/td\u003e\n\u003ctd\u003e7.2–7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAfrican cichlids\u003c\/td\u003e\n\u003ctd\u003e8.2 and above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater community, cichlid, goldfish and livebearer tanks across the full 6.0–9.0 range\u003c\/li\u003e\n\u003cli\u003eWeekly monitoring and tracking pH drift between water changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCorrecting a reading — this kit tests only. Use a pH adjuster to actually move the number\u003c\/li\u003e\n\u003cli\u003eMarine reef pH, which typically sits above this kit's 9.0 ceiling and needs a dedicated marine pH test\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety and handling\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKeep out of reach of children.\u003c\/li\u003e\n\u003cli\u003eAvoid eye and skin contact with the reagent; rinse well with water if contact occurs.\u003c\/li\u003e\n\u003cli\u003eStore the bottle capped tightly and out of direct sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-deluxe-ph-test-kit-with-liquid-adjusters\"\u003eAPI Deluxe pH Test Kit with Liquid Adjusters\u003c\/a\u003e — if you also want pH Up and pH Down on hand to act on what you read.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-freshwater-master-multi-test-kit-5-in-1\"\u003eAPI Freshwater Master Multi Test Kit 5 in 1\u003c\/a\u003e — adds ammonia, nitrite and nitrate to your regular testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-gh-and-kh-test-kit\"\u003eAPI GH and KH Test Kit\u003c\/a\u003e — hardness drives pH stability, so it's worth tracking alongside it.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/api-stress-coat\"\u003eAPI Stress Coat\u003c\/a\u003e — conditions the fresh water you mix in when correcting a reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThis is a consumable test kit, so no manufacturer warranty period applies. That does not affect your rights under the Australian Consumer Law: if the product is faulty, unsafe or not as described, you are entitled to a remedy. Ships as standard freight.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat pH should my freshwater tank be?\u003c\/h4\u003e\n\u003cp\u003eIt depends on what you keep. API's guidance suggests around 7.0 for a general community tank, around 7.5 for goldfish, 6.5–6.8 for angelfish and neon tetras, and 8.2 or above for African cichlids. A pH your fish are already stable at is usually safer than forcing a textbook number.\u003c\/p\u003e\n\u003ch4\u003eDoes this kit cover African cichlid tanks?\u003c\/h4\u003e\n\u003cp\u003eYes. Its 6.0–9.0 range comfortably covers the 8.2-plus readings typical of a hard-water African cichlid setup, which a narrower-range pH kit would not.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit for a marine or reef tank?\u003c\/h4\u003e\n\u003cp\u003eIt will read up to 9.0, which covers typical reef pH, but API markets this as a freshwater kit and reef keepers are usually better served by a marine-specific pH test paired with alkalinity and calcium testing.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test?\u003c\/h4\u003e\n\u003cp\u003eWeekly is a reasonable routine for a stable, established tank. Test daily during a water change, a new setup, or if fish are showing signs of stress.\u003c\/p\u003e\n\u003ch4\u003eWhy does my reading change through the day?\u003c\/h4\u003e\n\u003cp\u003eAquarium pH naturally rises through daylight hours as plants and algae consume CO2, then falls overnight. Testing at the same time each day makes readings genuinely comparable.\u003c\/p\u003e","brand":"API","offers":[{"title":"Default Title","offer_id":55242295836963,"sku":"BA1997","price":27.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/api-freshwater-ph-test-kit-43875865461027.webp?v=1790239781"},{"product_id":"red-sea-iodine-pro-reagent-refill-kit","title":"Red Sea Iodine Pro - reagent refill kit","description":"\u003cp\u003e\u003cstrong\u003eFifty more iodine tests at a hundredth of a part per million.\u003c\/strong\u003e This Red Sea Iodine Pro reagent refill is genuine part R21431. It restocks the Iodine Pro test with 50 tests of total iodine — measured as iodide and iodate across a 0 to 0.09 ppm range, resolving to 0.01 ppm — and keeps the syringe, glass vials and colour reference you already own in service.\u003c\/p\u003e\n\u003cp\u003eIodine sits at 0.06 ppm in a reef running to Red Sea's target. That is six increments off the bottom of the scale, which is precisely why the reagent has to be fresh: at this concentration an aged bottle does not read slightly wrong, it reads meaninglessly.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Red Sea part R21431\u003c\/strong\u003e — the same reagents and reference standard Red Sea supplies in the complete Iodine Pro kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50 tests restored\u003c\/strong\u003e — the full test count of the Iodine Pro test, without rebuying the glassware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.01 ppm resolution against a 0.06 ppm target\u003c\/strong\u003e — fine enough to show a dose landing, where a broad colour kit reads the same before and after.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes the 0.06 ppm reference standard\u003c\/strong\u003e — Red Sea's safety data sheet lists Reagent A, Reagent B and the Standard 0.06 under this refill's part code.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo timer needed\u003c\/strong\u003e — the reaction is complete when the standard vial matches the colour chart, so the method self-times.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my kit?\u003c\/h3\u003e\n\u003cp\u003eIt is the reagent refill for Red Sea's \u003cstrong\u003eIodine Pro test, kit part R21430\u003c\/strong\u003e. We do not currently stock that standalone kit.\u003c\/p\u003e\n\u003cp\u003eThe same 50-test Iodine Pro module also sits inside the \u003ca href=\"\/products\/red-sea-coral-colors-pro-test-kit\"\u003eRed Sea Coral Colours Pro Test Kit\u003c\/a\u003e alongside the potassium and iron tests, and this refill is the iodine restock for it. Red Sea also publishes a combined Trace-Colors Pro multi test refill covering all three elements, so if you own the multi kit, check the reagent bottle labels against R21431 before ordering — you may want the combined refill instead.\u003c\/p\u003e\n\u003cp\u003eIt does not fit any non-Red Sea iodine test, and it will not refill a potassium or iron test.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRed Sea Iodine Pro reagents and the 0.06 ppm reference standard, enough for 50 tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cp\u003eReagents only. The \u003cstrong\u003e10 mL syringe, glass vials, colour reference card, instruction manual and storage case\u003c\/strong\u003e come with the complete kit. So does the supplement — \u003ca href=\"\/products\/red-sea-trace-colors-a-500ml\"\u003eTrace Colours A (Iodine+)\u003c\/a\u003e is a separate purchase.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer part number\u003c\/th\u003e\n\u003ctd\u003eR21431\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRefill for\u003c\/th\u003e\n\u003ctd\u003eRed Sea Iodine Pro Test Kit (R21430), and the Iodine Pro module of the Coral Colours Pro kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter measured\u003c\/th\u003e\n\u003ctd\u003eTotal iodine, as iodide (I-) and iodate (IO3-)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest method\u003c\/th\u003e\n\u003ctd\u003eColorimetric comparison against a reference standard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTests restored\u003c\/th\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003ctd\u003e0 to 0.09 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e0.01 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRed Sea reef target\u003c\/th\u003e\n\u003ctd\u003e0.06 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplement metered\u003c\/th\u003e\n\u003ctd\u003eRed Sea Trace Colours A (Iodine+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eMarine and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003eOriginal containers, closed, cool and dry, out of direct sunlight, away from large temperature swings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat to do when the reading is off\u003c\/h3\u003e\n\u003ch4\u003eBelow 0.06 ppm\u003c\/h4\u003e\n\u003cp\u003eDose \u003ca href=\"\/products\/red-sea-trace-colors-a-500ml\"\u003eTrace Colours A (Iodine+)\u003c\/a\u003e, which supplies iodine along with the other halogens, bromine and fluorine. Red Sea's guidance is to test the colour elements weekly while dosing daily.\u003c\/p\u003e\n\u003ch4\u003eAbove 0.06 ppm\u003c\/h4\u003e\n\u003cp\u003eRed Sea's instruction is direct: change 50% of the water and halve the supplement dose. Iodine becomes toxic above natural seawater concentrations, and the warning signs are soft tissue regression in hard corals and pale colouration in soft corals.\u003c\/p\u003e\n\u003ch4\u003eReading zero on a tank you are dosing\u003c\/h4\u003e\n\u003cp\u003eConfirm the reagent is in date before you increase the dose. At a 0.06 ppm target, an aged reagent and an empty tank look identical on the colour card.\u003c\/p\u003e\n\n\u003ch3\u003eCare and handling\u003c\/h3\u003e\n\u003cp\u003eRinse the glass vials in RO water between tests. Residual reagent biases a colorimetric result more than most people expect at this concentration.\u003c\/p\u003e\n\u003cp\u003eStore the reagents closed in their original containers, cool, dry and away from direct sun and large temperature changes. Keep them away from acids, alkalis, oxidising compounds and metals.\u003c\/p\u003e\n\u003cp\u003eDo not tip used test water back into the aquarium. Red Sea classifies Reagent A as toxic to aquatic life, so spent samples go down the sink, not into the sump.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eRed Sea's safety data sheet covers this refill and the complete kit together. \u003cstrong\u003eReagent B carries the signal word Danger\u003c\/strong\u003e — it may be corrosive to metals and causes severe skin burns and eye damage, and is listed as containing nitric acid 70% at 25–50% and ammonium iron bis(sulphate) at 5–10%. Reagent A is classified as toxic to aquatic life and contains sodium nitrite at 4%. The reference standard contains potassium iodate at 5–10%. Reagent A and the standard carry no signal word.\u003c\/p\u003e\n\u003cp\u003eKeep out of reach of children. In the eyes, rinse with plenty of water for at least 15 minutes and get medical attention. If swallowed, do not induce vomiting — if the person is conscious, wash the mouth thoroughly with plenty of water, and seek immediate medical attention.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for:\u003c\/strong\u003e reef aquariums running Red Sea's coral coloration programme, anyone already dosing an iodine supplement without measuring it, and anyone whose Iodine Pro reagents have run down or passed their date.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e a first purchase, since there is no glassware or syringe in this box. It is also not for freshwater or planted tanks, and it is not the right first test on a system whose calcium, alkalinity and magnesium are still moving — foundation comes before colour.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-colors-pro-test-kit\"\u003eRed Sea Coral Colours Pro Test Kit\u003c\/a\u003e — iodine, potassium and iron in one case, and the kit this refill most often restocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-trace-colors-a-500ml\"\u003eRed Sea Trace Colours A (Iodine+)\u003c\/a\u003e — the supplement you dose against the reading.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-coral-colours-abcd-4-x100ml-bottles-trial-pack\"\u003eRed Sea Trace Colours ABCD Trial Pack\u003c\/a\u003e — all four colour supplements in 100 mL bottles.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-potassium-pro-reagent-refill-kit\"\u003eRed Sea Potassium Pro Reagent Refill\u003c\/a\u003e — the next reagent in the same case to run out.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eRed Sea Reef Foundation Pro Multi Test Kit\u003c\/a\u003e — the calcium, alkalinity and magnesium testing this programme assumes is already stable.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/red-sea-1\"\u003eRed Sea range\u003c\/a\u003e — the rest of the Reef Care testing and supplement program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eReagents are consumables and carry no service warranty. Any manufacturer warranty Red Sea offers applies in addition to your rights under the Australian Consumer Law, which are not limited or excluded by it. A pack arriving leaking, damaged or out of date is replaced.\u003c\/p\u003e\n\u003cp\u003eShips as a standard small parcel. The reagent volumes are well under the threshold for dangerous goods handling, so no special freight applies.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many tests does the Red Sea Iodine Pro reagent refill provide?\u003c\/h4\u003e\n\u003cp\u003eThe refill provides 50 tests, which is the full test count Red Sea specifies for the Iodine Pro test.\u003c\/p\u003e\n\u003ch4\u003eWhat does the Red Sea Iodine Pro test actually measure?\u003c\/h4\u003e\n\u003cp\u003eIt measures total iodine, counting both iodide and iodate, over a range of 0 to 0.09 ppm with a resolution of 0.01 ppm. Red Sea's published reef target is 0.06 ppm, which is the concentration found in natural seawater.\u003c\/p\u003e\n\u003ch4\u003eWhat is the part number, and does it fit the Coral Colours Pro kit?\u003c\/h4\u003e\n\u003cp\u003eThe refill is Red Sea part R21431 and the standalone kit is R21430. The same Iodine Pro module sits inside the Coral Colours Pro multi test kit, so this refill restocks its iodine test — though Red Sea also sells a combined multi-test refill covering iodine, potassium and iron together.\u003c\/p\u003e\n\u003ch4\u003eMy iodine reads high. What should I do?\u003c\/h4\u003e\n\u003cp\u003eRed Sea's instruction is to change 50% of the water and reduce the supplement dose by half. Iodine is toxic above natural seawater concentrations, and an overdose shows as soft tissue regression in hard corals and loss of colour in soft corals.\u003c\/p\u003e\n\u003ch4\u003eCan I pour the test sample back into the tank?\u003c\/h4\u003e\n\u003cp\u003eNo. Red Sea classifies Reagent A as toxic to aquatic life, so used test water and reagent should be disposed of down the drain rather than returned to the aquarium or the sump.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test iodine?\u003c\/h4\u003e\n\u003cp\u003eRed Sea's guidance for the colour elements is to test weekly while dosing the supplements daily. Weekly testing catches a trend before a level runs away, without burning through 50 tests in a season.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242298392867,"sku":"BA0238","price":44.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-iodine-pro-reagent-r-43106817114403.webp?v=1790233226"},{"product_id":"red-sea-marine-care-copper-test-kit-100-tests","title":"Red Sea Marine Care - Copper Test Kit (100 tests)","description":"\u003cp\u003e\u003cstrong\u003eA copper test kit for saltwater aquariums, from Red Sea's Marine Care range.\u003c\/strong\u003e Copper is used to treat some parasites on marine fish, and it only works within a narrow range: too little does not treat the fish, and too much harms them. A test kit lets you check the level through a treatment, and confirm the copper has gone before the tank is used for anything else.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasures copper\u003c\/strong\u003e in marine aquarium water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart of Red Sea's Marine Care range\u003c\/strong\u003e, alongside the calcium, magnesium, phosphate, ammonia and nitrite\/nitrate kits we also stock.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures: copper\u003c\/li\u003e\n\u003cli\u003eWater type: saltwater\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for fish-only systems and hospital or quarantine tanks (a separate tank used to hold or treat fish) where copper is being used. Copper is toxic to corals and invertebrates such as shrimp, crabs and snails, so never dose it in a reef tank or a tank with invertebrates.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep the reagents (the test chemicals) out of reach of children and follow the directions and safety information on the pack.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eYour rights under Australian Consumer Law apply. Ships by standard parcel post.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242298491171,"sku":"BA0227","price":39.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-marine-care-copper-t-43106817311011.webp?v=1790233226"},{"product_id":"red-sea-algae-control-pro-test-kit","title":"Red Sea Algae Control Pro Test Kit","description":"\u003cp\u003e\u003cstrong\u003eA Red Sea test kit for the two nutrients behind most reef algae problems.\u003c\/strong\u003e The Red Sea Algae Control Pro kit measures nitrate (NO3) and phosphate (PO4), the two nutrients Red Sea's Algae Management Program is built around. It uses colorimetric comparator tests (you compare the colour of a treated water sample against a colour reference), which Red Sea describes as high accuracy.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTests nitrate and phosphate\u003c\/strong\u003e in one kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh accuracy colorimetric comparator tests\u003c\/strong\u003e, made for reef aquariums.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart of Red Sea's Algae Management Program\u003c\/strong\u003e, which sets target levels for different kinds of reef.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Red Sea\u003c\/li\u003e\n\u003cli\u003eTests: nitrate (NO3) and phosphate (PO4)\u003c\/li\u003e\n\u003cli\u003eMethod: colorimetric comparator\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eMade for marine reef aquariums. Red Sea's recommended levels, in ppm (parts per million):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMixed reef and SPS frag tanks: nitrate 1 to 2, phosphate 0.08 to 0.12\u003c\/li\u003e\n\u003cli\u003eSPS dominant reef (small polyp stony corals): nitrate 0.25 to 0.5, phosphate 0.01 to 0.02\u003c\/li\u003e\n\u003cli\u003eUltra low nutrient SPS systems: nitrate 0, phosphate 0\u003c\/li\u003e\n\u003cli\u003eMarine fish only tanks: nitrate under 10, phosphate under 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep the reagents out of reach of children and read the safety information on each bottle before use.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eYour rights under Australian Consumer Law apply. Ships by standard parcel post.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default","offer_id":55269638078755,"sku":null,"price":92.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-algae-control-pro-te-43876743872803.webp?v=1790240040"},{"product_id":"red-sea-coral-colors-pro-test-kit","title":"Red Sea Coral Colours Pro Test Kit","description":"\u003cp\u003e\u003cstrong\u003eThe three colour elements, measured before you dose them.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Red Sea Coral Colours Pro Test Kit measures iodine, potassium and iron - the three leading elements in Red Sea's Trace Colours supplement program. One case holds 140 tests: 50 iodine, 40 potassium and 50 iron.\u003c\/p\u003e\n\u003cp\u003eThese are the elements most often dosed blind. All three are consumed quickly by a stocked reef, and all three cause problems when overdosed, which is exactly why the supplements are sold alongside a test rather than on their own.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree separate Pro kits in one case\u003c\/strong\u003e - Iodine Pro, Potassium Pro and Iron Pro, rather than three purchases and three boxes on the shelf.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotassium resolves to 3 ppm across a 150-450 ppm range\u003c\/strong\u003e - fine enough to see the drift between weekly tests, which a broad colour-card kit cannot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIron measures to 0.5 ppm\u003c\/strong\u003e - covers the 0.15 ppm reef target with headroom, so a chelated iron dose does not simply peg the top of the scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIodine resolves to 0.01 ppm\u003c\/strong\u003e - meaningful against a 0.06 ppm target, where a coarser kit reads the same before and after a dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatched to the dosing range\u003c\/strong\u003e - each result maps to one Trace Colours supplement, so a reading tells you what to add rather than just where you are.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e140 tests per case\u003c\/strong\u003e - roughly a year of weekly testing on a single parameter, or several months testing all three.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIodine Pro test - 50 tests\u003c\/li\u003e\n\u003cli\u003ePotassium Pro test - 40 tests\u003c\/li\u003e\n\u003cli\u003eIron Pro test - 50 tests\u003c\/li\u003e\n\u003cli\u003eReagents, syringes, vials and colour references for each of the three tests\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003cli\u003eStorage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo supplements.\u003c\/strong\u003e \u003ca href=\"\/products\/red-sea-trace-colors-a-500ml\"\u003eTrace Colours A\u003c\/a\u003e, \u003ca href=\"\/products\/red-sea-trace-colors-b-500ml\"\u003eB\u003c\/a\u003e and \u003ca href=\"\/products\/red-sea-trace-colors-c-500ml\"\u003eC\u003c\/a\u003e are sold separately\u003c\/li\u003e\n\u003cli\u003eNo calcium, alkalinity or magnesium tests - those are the \u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro kit\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo nitrate or phosphate tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eTest\u003c\/th\u003e\n\u003cth\u003eTests included\u003c\/th\u003e\n\u003cth\u003eMeasuring range\u003c\/th\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIodine (I2)\u003c\/th\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e0 - 0.09 ppm\u003c\/td\u003e\n\u003ctd\u003e0.01 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePotassium (K)\u003c\/th\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e150 - 450 ppm\u003c\/td\u003e\n\u003ctd\u003e3 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIron (Fe)\u003c\/th\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e0 - 0.5 ppm\u003c\/td\u003e\n\u003ctd\u003e0.05 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eTotal 140 tests. Saltwater and reef use only.\u003c\/p\u003e\n\n\u003ch3\u003eTarget levels, and what to do about the reading\u003c\/h3\u003e\n\u003cp\u003eThese are Red Sea's published reef targets. Each element pairs with one supplement, so a low reading points at a single bottle rather than a guess.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eElement\u003c\/th\u003e\n\u003cth\u003eRed Sea reef target\u003c\/th\u003e\n\u003cth\u003eSupplement if low\u003c\/th\u003e\n\u003cth\u003eWhat else that supplement carries\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIodine\u003c\/th\u003e\n\u003ctd\u003e0.06 ppm\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-trace-colors-a-500ml\"\u003eTrace Colours A (Iodine+)\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eHalogens - iodine, bromine, fluorine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePotassium\u003c\/th\u003e\n\u003ctd\u003e400 ppm\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-trace-colors-b-500ml\"\u003eTrace Colours B (Potassium+)\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003ePotassium and boron complex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIron\u003c\/th\u003e\n\u003ctd\u003e0.15 ppm total iron\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/red-sea-trace-colors-c-500ml\"\u003eTrace Colours C (Iron+)\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eIron, manganese, cobalt, copper, aluminium, zinc, chrome, nickel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eRed Sea's guidance is to test the colour elements weekly and dose the Trace Colours supplements daily. \u003ca href=\"\/products\/red-sea-reef-care-bioactive-trace-colours-d\"\u003eTrace Colours D\u003c\/a\u003e completes the program but has no test in this kit - it is dosed to schedule, not to a reading.\u003c\/p\u003e\n\u003cp\u003eA reading above target is a reason to stop dosing that element, not to dose the others harder. Copper sits inside the Iron+ blend, so persistent overdosing there is a genuine invertebrate risk.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Red Sea test kit do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003cth\u003eMeasures\u003c\/th\u003e\n\u003cth\u003eUse it when\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReef Foundation Pro\u003c\/th\u003e\n\u003ctd\u003eCalcium, alkalinity, magnesium\u003c\/td\u003e\n\u003ctd\u003eAlways - these are the parameters that crash a reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoral Colours Pro\u003c\/th\u003e\n\u003ctd\u003eIodine, potassium, iron\u003c\/td\u003e\n\u003ctd\u003eOnce foundation is stable and you are dosing for colour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eFoundation comes first. Chasing iodine on a tank whose alkalinity swings 2 dKH a week solves nothing.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003ch4\u003eSuitable for\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eReef aquariums running the Red Sea Trace Colours or Coral Coloration program\u003c\/li\u003e\n\u003cli\u003eMixed and SPS reefs where colour, not growth, is the current goal\u003c\/li\u003e\n\u003cli\u003eAnyone already dosing iodine, potassium or iron without testing for it\u003c\/li\u003e\n\u003cli\u003eFrag systems where pigment is the product\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNot suitable for\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater and planted aquariums - the ranges and reagents are set for seawater\u003c\/li\u003e\n\u003cli\u003eA new tank still stabilising calcium, alkalinity and nutrients\u003c\/li\u003e\n\u003cli\u003eFish-only marine systems, where these elements are not being consumed by anything\u003c\/li\u003e\n\u003cli\u003eReplacing a foundation test kit - it measures none of the same parameters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eKeep reagents capped, upright and out of direct sun, and store the case at normal room temperature rather than in a hot garage. Reagent age is the usual explanation for a result that suddenly disagrees with everything else.\u003c\/p\u003e\n\u003cp\u003eRinse vials in RO water between tests. Tap water residue and leftover reagent are the two things that quietly bias a colorimetric result.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-coral-colours-abcd-4-x100ml-bottles-trial-pack\"\u003eTrace Colours ABCD trial pack\u003c\/a\u003e - all four supplements in 100 mL bottles, the sensible companion to a first test kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-iodine-pro-reagent-refill-kit\"\u003eIodine Pro reagent refill\u003c\/a\u003e - refills the iodine test without rebuying the case.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-potassium-pro-reagent-refill-kit\"\u003ePotassium Pro reagent refill\u003c\/a\u003e - same for the potassium test.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-foundation-pro-multi-testing-kit\"\u003eReef Foundation Pro Multi Test Kit\u003c\/a\u003e - the calcium, alkalinity and magnesium kit this one assumes you already run.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-pro-sea-salts-22-kg-660-ltr-bucket\"\u003eCoral Pro Salt 22 kg\u003c\/a\u003e - water changes that hold potassium near target without dosing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eReagents are consumables and carry no service warranty, but the consumer guarantees under Australian Consumer Law apply to the kit. A case arriving with leaking, damaged or out-of-date reagents is replaced.\u003c\/p\u003e\n\u003cp\u003eThis ships as a standard parcel. It is not a dangerous goods item, though the reagents should be kept away from children and out of the sun in a hot car.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat does the Red Sea Coral Colours Pro Test Kit measure?\u003c\/h4\u003e\n\u003cp\u003eThe Red Sea Coral Colours Pro Test Kit measures iodine, potassium and iron in marine and reef aquariums, with 50 iodine tests, 40 potassium tests and 50 iron tests in one case. These are the three leading elements in Red Sea's Trace Colours supplement range.\u003c\/p\u003e\n\u003ch4\u003eWhat are the target levels for iodine, potassium and iron in a reef tank?\u003c\/h4\u003e\n\u003cp\u003eRed Sea publishes reef targets of 0.06 ppm iodine, 400 ppm potassium and 0.15 ppm total iron, covering both chelated and non-chelated iron. Each of those targets sits inside the measuring range of the matching test in this kit.\u003c\/p\u003e\n\u003ch4\u003eHow often should I test these three elements?\u003c\/h4\u003e\n\u003cp\u003eRed Sea's guidance is to test the colour elements weekly while dosing the Trace Colours supplements daily. Weekly testing is frequent enough to catch a trend before a level runs away, without burning through 140 tests in a season.\u003c\/p\u003e\n\u003ch4\u003eDo I need this kit if I already have the Reef Foundation Pro kit?\u003c\/h4\u003e\n\u003cp\u003eThey measure completely different parameters and neither substitutes for the other. Reef Foundation Pro covers calcium, alkalinity and magnesium, which keep corals alive; Coral Colours Pro covers the trace elements that influence pigment once those foundations are already stable.\u003c\/p\u003e\n\u003ch4\u003eCan I use this kit on a freshwater or planted tank?\u003c\/h4\u003e\n\u003cp\u003eNo. The reagents and measuring ranges are calibrated for seawater, and iron in a planted freshwater tank is dosed at concentrations well outside this kit's scale.\u003c\/p\u003e\n\u003ch4\u003eIs this the same product as the Reef Colours Pro kit?\u003c\/h4\u003e\n\u003cp\u003eRed Sea has used both Coral Colours and Reef Colours naming for the iodine, potassium and iron multi test over the years, and the supplements are now branded Trace Colours A, B, C and D. If you are matching an existing kit, check the three tests listed on the box rather than the range name.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default","offer_id":55269638111523,"sku":null,"price":118.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-coral-colors-pro-tes-46119503495459.webp?v=1790240040"}],"url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/collections\/builder-test-kit.oembed?page=2","provider":"Nicks AOT","version":"1.0","type":"link"}