{"product_id":"red-sea-reef-care-magnesium-foundation-c-powder","title":"Red Sea Reef Care Magnesium Foundation C (Powder)","description":"\u003cp\u003e\u003cstrong\u003eThe same magnesium blend, mixed to full strength.\u003c\/strong\u003e Red Sea Reef Foundation C Powder is the concentrated dry form of the magnesium element in the three-part Reef Foundation program. Mixed into a stock solution with RO\/DI water at full liquid strength, it keeps magnesium — and therefore calcium and alkalinity — stable on a larger system.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixes to full liquid strength\u003c\/strong\u003e — 1 mL of mixed stock raises 100 L by 1 ppm Mg, same as the ready-to-use liquid.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame magnesium salt blend\u003c\/strong\u003e as the liquid, balanced to natural seawater ratios.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpace-efficient\u003c\/strong\u003e — a 1 kg tub replaces a large volume of pre-mixed liquid on the shelf.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk option\u003c\/strong\u003e — the 18 kg pail suits larger systems and multi-tank dosing stations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003cth\u003eMix ratio\u003c\/th\u003e\n\u003cth\u003eStock solution dose for +1 ppm Mg\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 kg\u003c\/td\u003e\n\u003ctd\u003eRED304\u003c\/td\u003e\n\u003ctd\u003e1 kg in 1.67 L RO\/DI water\u003c\/td\u003e\n\u003ctd\u003e1 mL of stock per 100 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18 kg\u003c\/td\u003e\n\u003ctd\u003eRED304a\u003c\/td\u003e\n\u003ctd\u003e18 kg in approx. 30 L RO\/DI water\u003c\/td\u003e\n\u003ctd\u003e1 mL of stock per 100 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eMixing and dosing\u003c\/h3\u003e\n\u003cp\u003eDissolve the full tub into the stated volume of RO\/DI water — 1 kg into 1.67 L for the standard tub, scaled up to roughly 30 L for the 18 kg pail. The result mixes to the same strength as the ready-to-use liquid: dose 1 mL of stock per 100 L of tank water for every 1 ppm you need to raise magnesium, correcting gradually over several days for anything larger than about 20 ppm.\u003c\/p\u003e\n\u003ch4\u003eWhy does this mix so much stronger than Foundation B powder?\u003c\/h4\u003e\n\u003cp\u003eEach element mixes to its own ratio. Foundation C dissolves to the same strength as the liquid; Foundation B is diluted further and doses at 3 mL per 100 L instead of 1 mL. Follow the ratio on the tub you have rather than assuming they match.\u003c\/p\u003e\n\u003ch3\u003eCapacity\u003c\/h3\u003e\n\u003cp\u003eA 1 kg tub mixes to enough stock to raise 167,000 L of tank water by 1 ppm. The 18 kg pail raises just over 3,000,000 L by the same 1 ppm.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eLitres raised 1 ppm Mg per pack\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 kg\u003c\/td\u003e\n\u003ctd\u003e167,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18 kg\u003c\/td\u003e\n\u003ctd\u003e3,006,000 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for marine and reef aquariums running calcium and alkalinity dosing, particularly larger systems where mixing your own magnesium stock is worth the saving over pre-mixed liquid. Not suitable if you don't have RO\/DI water and a mixing container on hand — buy the ready-to-use liquid instead. Not intended for freshwater aquariums.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep out of reach of children and pets. Avoid inhaling the dry powder when mixing; avoid prolonged skin and eye contact. Store the sealed tub away from moisture. Safe for fish, coral and invertebrates once mixed and dosed at the recommended rate.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/red-sea-reef-care-kh-foundation-b-powder\"\u003eRed Sea Reef Care KH\/Alkalinity Foundation B (Powder)\u003c\/a\u003e — the matching alkalinity element in dry format.\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 — dose alongside so calcium tracks magnesium and alkalinity.\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 — test Mg before you dose, not after.\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 ready-to-use liquid, for smaller tanks or when mixing isn't worth the saving.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by the manufacturer's standard consumer guarantees in addition to your rights under Australian Consumer Law. The 18 kg pail ships on a pallet-rated carton — check delivery access for larger vehicles if you're off the beaten track.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDo I need RO\/DI water to mix this?\u003c\/h4\u003e\n\u003cp\u003eYes — tap water can introduce phosphate, silicate or metals that dosing pure magnesium salts is meant to avoid.\u003c\/p\u003e\n\u003ch4\u003eIs the 18 kg pail worth it over the 1 kg tub?\u003c\/h4\u003e\n\u003cp\u003eIt only pays off if you have the dosing volume and storage to use it.\u003c\/p\u003e\n\u003ch4\u003eCan I dose the mixed stock through a dosing pump?\u003c\/h4\u003e\n\u003cp\u003eYes — once mixed it doses exactly like the liquid, at 1 mL of stock per 100 L per 1 ppm.\u003c\/p\u003e\n\u003ch4\u003eHow long does the mixed stock keep?\u003c\/h4\u003e\n\u003cp\u003eStore it sealed and out of direct sunlight, and use it within a few months for best results, as with any reef dosing solution.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"1kg","offer_id":54774154133795,"sku":"RED304","price":46.5,"currency_code":"AUD","in_stock":true},{"title":"18kg","offer_id":55335147700515,"sku":"RED304a","price":588.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reef-care-magnesium--10135200923939-1-dq.webp?v=1790372841","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-reef-care-magnesium-foundation-c-powder","provider":"Nicks AOT","version":"1.0","type":"link"}