{"product_id":"seachem-reef-calcium-bioavailable-liquid-supplement","title":"Seachem Reef Calcium","description":"\u003cp\u003eSeachem \u003cstrong\u003eReef Calcium\u003c\/strong\u003e is a concentrated bioavailable polygluconate complex of calcium that supports the rapid uptake required by stony corals, coralline algae, and other reef invertebrates. Unlike standard calcium chloride or calcium hydroxide supplements, the polygluconate form is far less likely to be lost as a precipitate, so more of every dose reaches your coral.\u003c\/p\u003e\n\n\u003cp\u003eUse it alongside \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eour full additives and supplements collection\u003c\/a\u003e, verify dose with a \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-calcium-pro-test-kit\"\u003ecalcium test kit\u003c\/a\u003e, and pair with \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-prime-complete-concentrated-water-conditioner\"\u003eSeachem Prime\u003c\/a\u003e for routine water changes.\u003c\/p\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBioavailable polygluconate complex\u003c\/strong\u003e, taken up directly by stony corals and coralline algae\u003c\/li\u003e\n\u003cli\u003eMinimal precipitation, more of each dose stays in solution\u003c\/li\u003e\n\u003cli\u003eDoes not deplete strontium, magnesium, or other reef elements\u003c\/li\u003e\n\u003cli\u003eCompatible with all standard 2-part and balanced reef dosing programs\u003c\/li\u003e\n\u003cli\u003eAvailable in three sizes for nano up to large reef systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eDosing\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard dose:\u003c\/strong\u003e 1 capful (5 mL) per 80 L (20 US gallons) once or twice per week\u003c\/li\u003e\n\u003cli\u003eEach capful raises calcium by approximately 1 mg\/L per 80 L\u003c\/li\u003e\n\u003cli\u003eTarget calcium for reef tanks is typically 380 to 450 mg\/L\u003c\/li\u003e\n\u003cli\u003eTest weekly and adjust dose to match consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;width:35%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eReef calcium supplement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eForm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eLiquid, polygluconate complex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eWater Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSaltwater reef\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eReef Safe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/red-sea-calcium-pro-test-kit\"\u003eRed Sea Calcium Pro Test Kit\u003c\/a\u003e for weekly verification\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/salifert-calcium-test-kit\"\u003eSalifert Calcium Test Kit\u003c\/a\u003e as a budget option\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-prime-complete-concentrated-water-conditioner\"\u003eSeachem Prime\u003c\/a\u003e for water changes\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eBrowse all reef supplements\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill Reef Calcium replace my 2-part?\u003c\/strong\u003e\u003cbr\u003e\nFor light to moderate reef demand, yes. For SPS-dominant or high-demand reefs, use Reef Calcium alongside an alkalinity supplement to keep Ca and Alk balanced.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes it raise alkalinity?\u003c\/strong\u003e\u003cbr\u003e\nNo, this is calcium only. Pair with an alkalinity supplement to maintain balance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs it safe with inverts and fish?\u003c\/strong\u003e\u003cbr\u003e\nYes, when used at the recommended dose Reef Calcium is safe for fish, corals, and invertebrates including clams and shrimp.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"100 mL","offer_id":48817219305691,"sku":null,"price":5.28,"currency_code":"USD","in_stock":false},{"title":"250 mL","offer_id":48817219338459,"sku":"356","price":7.52,"currency_code":"USD","in_stock":true},{"title":"500 mL","offer_id":48817219371227,"sku":null,"price":11.55,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/0356-Reef-Calcium-250-mL.png?v=1779969881","url":"https:\/\/squeakysaquatics.com\/products\/seachem-reef-calcium-bioavailable-liquid-supplement","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}