{"product_id":"seachem-reef-carbonate","title":"Seachem Reef Carbonate","description":"\u003cp\u003e\u003cstrong\u003eLiquid alkalinity, ready for a dosing pump.\u003c\/strong\u003e Seachem Reef Carbonate is a concentrated blend of carbonate and bicarbonate salts that restores and maintains alkalinity in the reef aquarium — in liquid form, so it mixes and doses cleanly through an automated system.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaises and maintains carbonate alkalinity (KH)\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid concentrate\u003c\/strong\u003e — each mL supplies a minimum of 4 meq of alkalinity, so it doses and dissolves instantly, unlike a powder.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDosing-pump friendly\u003c\/strong\u003e — a continuous-drip formula is published for automated systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with a calcium supplement\u003c\/strong\u003e such as Reef Complete for balanced reef chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCosts under 1c per litre of tank water dosed\u003c\/strong\u003e at every pack size.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003eStandard dose\u003c\/th\u003e\n\u003cth\u003eLitres this pack doses\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 mL\u003c\/td\u003e\n\u003ctd\u003e$9.95\u003c\/td\u003e\n\u003ctd\u003e5 mL per 80 L, twice weekly\u003c\/td\u003e\n\u003ctd\u003e1,600 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e250 mL\u003c\/td\u003e\n\u003ctd\u003e$9.75\u003c\/td\u003e\n\u003ctd\u003e5 mL per 80 L, twice weekly\u003c\/td\u003e\n\u003ctd\u003e4,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mL\u003c\/td\u003e\n\u003ctd\u003e$19.95\u003c\/td\u003e\n\u003ctd\u003e5 mL per 80 L, twice weekly\u003c\/td\u003e\n\u003ctd\u003e8,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eTarget alkalinity is 3–6 meq\/L (8–17 dKH); Seachem states a practical minimum of 2 meq\/L.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for reef and marine aquariums needing steady carbonate alkalinity, especially where a dosing pump is already handling other supplements.\u003c\/li\u003e\n\u003cli\u003eNot a calcium, magnesium or strontium source on its own.\u003c\/li\u003e\n\u003cli\u003eNot for freshwater aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDosage and directions\u003c\/h3\u003e\n\u003cp\u003eBeginner dose: dilute 1 capful (5 mL) in freshwater and add per 80 L of system volume, twice weekly. Check alkalinity every fortnight. Each 5 mL\/80 L dose raises alkalinity by roughly 0.25 meq\/L; do not exceed 20 mL per 80 L in a single day.\u003c\/p\u003e\n\u003cp\u003eFor a continuous dosing pump, Seachem publishes the formula m = va\/4, where m is mL of Reef Carbonate, v is tank volume in litres and a is the meq\/L rise wanted.\u003c\/p\u003e\n\u003cp\u003eCost per litre at every pack size works out under 1c, calculated on the standard dose. The 100 mL bottle costs more per millilitre of product than the two larger sizes — buy the 250 mL or 500 mL bottle unless you only want to trial the product:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePack size\u003c\/th\u003e\n\u003cth\u003eCost per litre dosed\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 mL\u003c\/td\u003e\n\u003ctd\u003eUnder 1c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e250 mL\u003c\/td\u003e\n\u003ctd\u003eUnder 1c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500 mL\u003c\/td\u003e\n\u003ctd\u003eUnder 1c per litre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDo not mix directly with a calcium, magnesium or strontium supplement — dose on alternate days or space doses at least 30 minutes apart.\u003c\/li\u003e\n\u003cli\u003eDo not exceed 20 mL per 80 L per day. Excess alkalinity can push calcium, magnesium and strontium out of solution.\u003c\/li\u003e\n\u003cli\u003eA Safety Data Sheet is available from Seachem for handling and storage guidance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCare and storage\u003c\/h3\u003e\n\u003cp\u003eKeep the cap sealed between doses and store out of direct sunlight at room temperature.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-reef-complete\"\u003eSeachem Reef Complete\u003c\/a\u003e — the calcium, magnesium and strontium side of reef chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-reef-builder\"\u003eSeachem Reef Builder\u003c\/a\u003e — a powder alternative for dosing by hand rather than by pump.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by the manufacturer's standard warranty against defects, in addition to your rights under Australian Consumer Law. Standard freight.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eIs Reef Carbonate better than Reef Builder?\u003c\/h4\u003e\n\u003cp\u003eNeither is better outright — Reef Carbonate is a liquid, which suits dosing pumps and automated systems. Reef Builder is a powder, which is generally cheaper to buy in bulk if you're dosing by hand.\u003c\/p\u003e\n\u003ch4\u003eWhich pack size should I buy?\u003c\/h4\u003e\n\u003cp\u003eThe 100 mL bottle is priced for trialling the product and costs more per millilitre than the larger sizes. If you already know you'll be dosing regularly, the 250 mL or 500 mL bottle works out cheaper.\u003c\/p\u003e\n\u003ch4\u003eCan I dose it every day?\u003c\/h4\u003e\n\u003cp\u003eYou can, up to the daily maximum of 20 mL per 80 L, but test alkalinity regularly rather than dosing to a fixed schedule.\u003c\/p\u003e\n\u003ch4\u003eWill this affect my calcium level?\u003c\/h4\u003e\n\u003cp\u003eNot directly, but alkalinity and calcium interact — pushing alkalinity too high relative to calcium can cause calcium to drop out of solution, so dose both and test both.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"100ml","offer_id":55242264576291,"sku":"AA0845","price":9.95,"currency_code":"AUD","in_stock":true},{"title":"250ml","offer_id":55335265992995,"sku":"AA0844","price":9.75,"currency_code":"AUD","in_stock":true},{"title":"500ml","offer_id":55335266025763,"sku":"AA0843","price":19.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/0533-reef_plus-500_ml-scaled_bae72178-5910-4168-998c-f6208eaeae05.png?v=1782710546","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/seachem-reef-carbonate","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}