{"product_id":"red-sea-coral-pro-sea-salts-22-kg-660-ltr-bucket","title":"Red Sea Coral Pro Sea Salts - 22 kg (660 Ltr) Bucket","description":"\u003cp\u003e\u003cstrong\u003eSix hundred and sixty litres of growth-formula seawater, in one sealed bucket.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRed Sea Coral Pro Salt is the high-alkalinity salt in the Red Sea range, blended to 11.5-12.5 dKH with calcium and magnesium lifted to match. The 22 kg bucket mixes 660 litres at 35 ppt.\u003c\/p\u003e\n\u003cp\u003eThis is the size for a reef doing real volume - a 500 litre system on weekly 10% changes gets roughly thirteen changes from one bucket. Buy it when you have stopped thinking about salt in single water changes and started thinking in months.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e660 litres from one purchase\u003c\/strong\u003e - about three months of weekly 10% changes on a 500 litre system, so you reorder four times a year instead of monthly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScrew-top resealable bucket\u003c\/strong\u003e - the format that survives a Queensland summer. Salt draws moisture from humid air, and an airtight bucket is the difference between a scoopable last third and a solid block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11.5-12.5 dKH\u003c\/strong\u003e - carbonate headroom for a reef consuming alkalinity faster than a natural-seawater salt replaces it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium 450-480 mg\/L, magnesium 1350-1430 mg\/L\u003c\/strong\u003e - lifted proportionally, so no single foundation element runs ahead of the other two.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotassium 385-415 mg\/L\u003c\/strong\u003e - straddles Red Sea's 400 ppm reef target without separate dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDissolves clear in about 20 minutes\u003c\/strong\u003e - the reformulated blend, which matters when you are mixing 50 litres at a time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReusable bucket\u003c\/strong\u003e - most reefers end up using the empty as a mixing or change bucket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e$0.27 per litre mixed\u003c\/strong\u003e - the lowest cost per litre in the Coral Pro range, cheaper than both the 7 kg bucket and the 20 kg refill box at current pricing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich pack size do I need?\u003c\/h3\u003e\n\u003cp\u003eAll three packs are the identical formula. The choice is storage and turnover, not chemistry.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eMakes\u003c\/th\u003e\n\u003cth\u003eCost per litre\u003c\/th\u003e\n\u003cth\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e7 kg bucket\u003c\/th\u003e\n\u003ctd\u003e210 litres\u003c\/td\u003e\n\u003ctd\u003e$0.32 per litre\u003c\/td\u003e\n\u003ctd\u003eSystems under about 300 L, or trialling the formula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e20 kg refill box\u003c\/th\u003e\n\u003ctd\u003e600 litres\u003c\/td\u003e\n\u003ctd\u003e$0.31 per litre\u003c\/td\u003e\n\u003ctd\u003eDecanting into a bucket you already own; less plastic per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e22 kg bucket\u003c\/th\u003e\n\u003ctd\u003e660 litres\u003c\/td\u003e\n\u003ctd\u003e$0.27 per litre\u003c\/td\u003e\n\u003ctd\u003eLarger reefs wanting bulk volume in a sealed, reusable container\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eBuy the pack you will finish within roughly three months of opening. Beyond that, humidity starts to win.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003ctd\u003e22 kg bucket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMakes\u003c\/th\u003e\n\u003ctd\u003e660 litres at 35 ppt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMix ratio\u003c\/th\u003e\n\u003ctd\u003e1 kg per 30 litres of RO water (Red Sea pack rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eSynthetic high-alkalinity reef salt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlkalinity at 35 ppt\u003c\/th\u003e\n\u003ctd\u003e11.5-12.5 dKH (4.15-4.45 meq\/L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalcium at 35 ppt\u003c\/th\u003e\n\u003ctd\u003e450-480 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnesium at 35 ppt\u003c\/th\u003e\n\u003ctd\u003e1350-1430 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePotassium at 35 ppt\u003c\/th\u003e\n\u003ctd\u003e385-415 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eSaltwater and reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContainer\u003c\/th\u003e\n\u003ctd\u003eResealable screw-top bucket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDissolving time\u003c\/th\u003e\n\u003ctd\u003eAbout 20 minutes with circulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch3\u003eHow long will 660 litres last?\u003c\/h3\u003e\n\u003cp\u003eWater change volume is what determines this, not tank size on its own. The figures below assume a 10% weekly change.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem volume\u003c\/th\u003e\n\u003cth\u003eWeekly change\u003c\/th\u003e\n\u003cth\u003eOne 22 kg bucket lasts\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e200 litres\u003c\/th\u003e\n\u003ctd\u003e20 litres\u003c\/td\u003e\n\u003ctd\u003eAbout 33 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e400 litres\u003c\/th\u003e\n\u003ctd\u003e40 litres\u003c\/td\u003e\n\u003ctd\u003eAbout 16 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e500 litres\u003c\/th\u003e\n\u003ctd\u003e50 litres\u003c\/td\u003e\n\u003ctd\u003eAbout 13 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e800 litres\u003c\/th\u003e\n\u003ctd\u003e80 litres\u003c\/td\u003e\n\u003ctd\u003eAbout 8 weeks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eOn systems under about 200 litres, a bucket this size will still be open in nine months. The 7 kg bucket is the better buy there, even though the litre-for-litre maths says otherwise.\u003c\/p\u003e\n\n\u003ch3\u003eHow to mix it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eStart with RO or RO\/DI water at tank temperature, around 25 degrees C.\u003c\/li\u003e\n\u003cli\u003eAdd salt to water with a powerhead already running - never water to salt.\u003c\/li\u003e\n\u003cli\u003eWork to roughly 1 kg per 30 litres, then check and adjust.\u003c\/li\u003e\n\u003cli\u003eCirculate and aerate until completely clear, normally about 20 minutes.\u003c\/li\u003e\n\u003cli\u003eMatch temperature and salinity to the display before use.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eSet the final salinity with a refractometer, not with the scoop.\u003c\/strong\u003e The 1 kg per 30 litre rating is Red Sea's pack figure; the precise dose that lands on 35 ppt shifts with source water and measuring method.\u003c\/p\u003e\n\u003cp\u003eMixed saltwater is best used within about 24 hours. Standing longer, alkalinity drifts down and carbonate precipitates onto the bottom of the drum.\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\u003eLarger mixed reefs, LPS and soft coral systems in active growth\u003c\/li\u003e\n\u003cli\u003eFrag and coral grow-out systems doing high-volume changes\u003c\/li\u003e\n\u003cli\u003eReefers holding foundation levels by water change rather than by dosing\u003c\/li\u003e\n\u003cli\u003eAnyone mixing 40 litres or more at a time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNot suitable for\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater aquariums - this is full synthetic seawater, not a tonic or aquarium salt\u003c\/li\u003e\n\u003cli\u003eMature SPS reefs held at 7-8 dKH, where a 12 dKH change swings alkalinity enough to burn tips. \u003ca href=\"\/products\/red-sea-salt-20kg-refill-box-600ltr\"\u003eRed Sea Salt\u003c\/a\u003e at 7.7-8.2 dKH matches those systems\u003c\/li\u003e\n\u003cli\u003eNano and small systems - 660 litres will outlast its own shelf life in the bucket\u003c\/li\u003e\n\u003cli\u003eEvaporation top-up, which always uses fresh RO water only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eSeal the lid fully after every scoop and keep the bucket off a bare concrete floor. Concrete wicks moisture, and this is the single most common reason a part-used bucket sets solid.\u003c\/p\u003e\n\u003cp\u003eClumped salt has not gone off, but the mass per scoop changes, so weigh it instead of measuring by volume. Break up any lumps before they go into the mixing drum.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-seawater-refractometer\"\u003eRed Sea Seawater Refractometer\u003c\/a\u003e - the instrument that actually sets your salinity.\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 - verifies the calcium, alkalinity and magnesium your mixed water landed on.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-pro-salt-20kg-refill-box-600ltr\"\u003eCoral Pro Salt 20 kg refill box\u003c\/a\u003e - refills this bucket once it is empty.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-coral-pro-sea-salts-7-kg-210-ltr-bucket\"\u003eCoral Pro Salt 7 kg bucket\u003c\/a\u003e - the size that suits a smaller system.\u003c\/li\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 - covers the iodine, potassium and iron that water changes alone will not hold steady.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eSalt is a consumable and carries no service warranty, but the consumer guarantees under Australian Consumer Law apply. A bucket that arrives split, contaminated or that will not dissolve is replaced.\u003c\/p\u003e\n\u003cp\u003eAt 22 kg this is a heavy freight item, so expect it to be handled separately from a small parcel order. Check the lid seal and the bucket wall on arrival before you open it.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eHow many litres does a 22 kg bucket of Coral Pro Salt make?\u003c\/h4\u003e\n\u003cp\u003eA 22 kg bucket of Red Sea Coral Pro Salt makes 660 litres of seawater at 35 ppt, which is Red Sea's pack rating of 1 kg per 30 litres. Set the final salinity with a refractometer, since the exact dose to reach 35 ppt varies with source water.\u003c\/p\u003e\n\u003ch4\u003eIs the 22 kg bucket better value than the 20 kg refill box?\u003c\/h4\u003e\n\u003cp\u003eYes, on cost per litre. At current pricing the 22 kg bucket works out to $0.27 per litre, against $0.31 per litre for the 20 kg refill box - a case where the box, despite using less plastic, is not the cheaper buy. The bucket also gives you an airtight, reusable container, which the box does not.\u003c\/p\u003e\n\u003ch4\u003eMy bucket has set solid - is the salt still usable?\u003c\/h4\u003e\n\u003cp\u003eClumped salt is still chemically sound; it has absorbed atmospheric moisture, not degraded. Break the lumps up and weigh your dose rather than scooping by volume, because compacted salt is denser per scoop than loose salt.\u003c\/p\u003e\n\u003ch4\u003eCan I mix a full bucket of saltwater and store it?\u003c\/h4\u003e\n\u003cp\u003eStoring mixed saltwater beyond about 24 hours lets alkalinity drift down and carbonate precipitate out, so the water you use is not the water you mixed. Store the salt dry and mix each batch as you need it.\u003c\/p\u003e\n\u003ch4\u003eWill Coral Pro Salt raise the alkalinity in my tank?\u003c\/h4\u003e\n\u003cp\u003eOn a system currently sitting at 7-8 dKH, changing water with 12 dKH salt will pull the tank upward over successive changes. That is the intent on a growing reef, but it should be approached gradually rather than with one large change.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242298097955,"sku":"BA0352","price":179.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-coral-pro-sea-salts-43876738957603.webp?v=1790239781","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-coral-pro-sea-salts-22-kg-660-ltr-bucket","provider":"Nicks AOT","version":"1.0","type":"link"}