{"product_id":"red-sea-reef-foundation-a-calcium-powder-1kg","title":"Red Sea Foundation A Calcium+ Powder 1 KG (2.2lb)","description":"\u003cp\u003e\u003cstrong\u003eRed Sea Reef Foundation A\u003c\/strong\u003e is the calcium supplement in Red Sea's Reef Foundation ABC program. This \u003cstrong\u003e1 kg (2.2 lb)\u003c\/strong\u003e powder delivers calcium plus strontium and the minor elements found in coral skeletons, in the same ratio corals use to grow—an economical way to keep calcium dialed in for thriving SPS and LPS reefs.\u003c\/p\u003e\n\u003cp\u003eBuild the full program with more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/red-sea\"\u003eRed Sea\u003c\/a\u003e reef care and \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eadditives \u0026amp; supplements\u003c\/a\u003e at Squeaky's Aquatics.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eWhy Reef Foundation A\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains calcium\u003c\/strong\u003e — replenishes the calcium corals consume as they build their skeletons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkeleton-ratio blend\u003c\/strong\u003e — includes strontium and minor elements in the proportion found in coral skeletons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart of the ABC system\u003c\/strong\u003e — works alongside Foundation B (Alkalinity) and Foundation C (Magnesium) for balanced growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEconomical 1 kg powder\u003c\/strong\u003e — far more dosing per dollar than pre-mixed liquids; great for larger systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake your own solution\u003c\/strong\u003e — dissolve into a stock dosing solution or add directly per the program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eDosing \u0026amp; Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDose to your tank's measured calcium uptake, following Red Sea's Reef Foundation program.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever add more than 60 g at once\u003c\/strong\u003e, regardless of tank size; space larger amounts 10 minutes apart to avoid precipitation.\u003c\/li\u003e\n\u003cli\u003eTest calcium weekly and keep Calcium, Alkalinity, and Magnesium in balance.\u003c\/li\u003e\n\u003cli\u003eFor a stock solution, dissolve 1 kg into roughly 550 L (per Red Sea's Calcium+ guidelines).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0 4px;font-size:0.95em;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eRed Sea\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eReef Foundation A — Calcium+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eForm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003ePowder concentrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e1 kg (2.2 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eMaintains\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eCalcium (plus strontium \u0026amp; minor elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eProgram\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eUse with Foundation B (Alk) \u0026amp; C (Mg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eFor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eSaltwater reef aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-b-alkalinity-powder-1kg\"\u003eRed Sea Reef Foundation B (KH\/Alkalinity) Powder\u003c\/a\u003e — the alkalinity half of the program.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-c-magnesium-powder-1kg\"\u003eRed Sea Reef Foundation C (Magnesium) Powder\u003c\/a\u003e — keeps Ca \u0026amp; Alk in balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-pro-multi-test-kit-ca-alk-mg\"\u003eRed Sea Reef Foundation Pro Multi Test Kit\u003c\/a\u003e — test Ca, Alk \u0026amp; Mg to dose accurately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #666;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does Foundation A do?\u003c\/strong\u003e It maintains calcium—along with strontium and minor elements—so corals have the building blocks they need for skeletal growth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePowder vs. liquid—what's the difference?\u003c\/strong\u003e The powder is a concentrated, more economical form. You dose it per the program or dissolve it into your own stock solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much should I dose?\u003c\/strong\u003e It depends on your tank's calcium uptake—test weekly and dose to demand. Never add more than 60 g at once.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need all three (A, B, C)?\u003c\/strong\u003e For balanced coral growth, yes—calcium, alkalinity, and magnesium must be kept in proportion.\u003c\/p\u003e","brand":"Red Sea","offers":[{"title":"Default Title","offer_id":48784860250331,"sku":"R22017","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_cedc0a20-b271-4a28-b655-4666234761e9.jpg?v=1779135838","url":"https:\/\/squeakysaquatics.com\/products\/red-sea-reef-foundation-a-calcium-powder-1kg","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}