{"product_id":"seachem-reef-fusion-1","title":"Seachem Reef Fusion 1","description":"\u003cp\u003e\u003cstrong\u003eSeachem Reef Fusion 1\u003c\/strong\u003e is the calcium half of Seachem's Reef Fusion two-part dosing system. It supplies ionic calcium along with magnesium, strontium, and a full blend of trace elements, giving corals the building blocks they need for steady skeletal growth and vivid color. Available from a 500 mL bottle up to a 4 L value size.\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 #006064;padding-left:8px;\"\u003eWhy Reef Fusion 1\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 0;padding-left:20px;\"\u003e\n\u003cli\u003eRestores the calcium that hard corals, clams, and coralline algae pull from the water\u003c\/li\u003e\n\u003cli\u003eAlso supplies magnesium, strontium, and the trace elements a growing reef depends on\u003c\/li\u003e\n\u003cli\u003eDesigned as the part 1 (calcium) component of the Reef Fusion two-part system\u003c\/li\u003e\n\u003cli\u003eDose alongside an alkalinity source so calcium and carbonate stay in balance\u003c\/li\u003e\n\u003cli\u003eConcentrated liquid, offered in four sizes from nano reefs to large systems\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 #006064;padding-left:8px;\"\u003eHow to Dose\u003c\/h3\u003e\n\u003cp\u003eAdd Reef Fusion 1 as directed for your tank volume to hold calcium in the ideal 380 to 450 mg\/L range, and pair it with \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-2\"\u003eReef Fusion 2\u003c\/a\u003e so calcium and alkalinity rise together. Raise calcium gradually, no more than about 25 mg\/L per day, and test regularly. Heavily stocked SPS systems consume more, so dose to your tank's measured uptake.\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 #006064;padding-left:8px;\"\u003eThe Two-Part System\u003c\/h3\u003e\n\u003cp\u003eReef Fusion 1 and \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-2\"\u003eReef Fusion 2\u003c\/a\u003e are built to work together: part 1 carries calcium and trace elements, while part 2 carries carbonates and magnesium for alkalinity. Dosing both keeps the major and minor ions of natural reef water in their correct ratios. If you would rather use a single all-in-one calcium source, \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-complete\"\u003eReef Complete\u003c\/a\u003e is another option we stock.\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 #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:6px 0 0;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eFunction\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eCalcium and trace element supplement (Reef Fusion part 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eUse\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eReef and saltwater aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eTarget calcium\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e380 to 450 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eAlso supplies\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eMagnesium, strontium, trace elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003ePairs with\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-2\"\u003eReef Fusion 2\u003c\/a\u003e (alkalinity component)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eAvailable sizes\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003e500 mL, 1 L, 2 L, 4 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;\"\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\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 #006064;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-2\"\u003eSeachem Reef Fusion 2\u003c\/a\u003e: the alkalinity and carbonate half of the system\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-complete\"\u003eSeachem Reef Complete\u003c\/a\u003e: all-in-one calcium supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-builder\"\u003eSeachem Reef Builder\u003c\/a\u003e: raises carbonate alkalinity on its own\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-advantage-magnesium\"\u003eSeachem Reef Advantage Magnesium\u003c\/a\u003e: keeps magnesium in range so calcium and alkalinity stay stable\u003c\/li\u003e\n\u003cli\u003eBrowse the full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/seachem\"\u003eSeachem lineup\u003c\/a\u003e and our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003ereef additives and supplements\u003c\/a\u003e\n\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 #006064;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003e\u003cstrong\u003eDo I have to use Reef Fusion 2 with this?\u003c\/strong\u003e\u003cbr\u003eFor a balanced reef, yes. Reef Fusion 1 raises calcium and Reef Fusion 2 raises alkalinity, and corals draw on both at the same time. Dosing one without the other lets the second parameter drift.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003e\u003cstrong\u003eHow is this different from Reef Complete?\u003c\/strong\u003e\u003cbr\u003eReef Complete is an all-in-one calcium supplement you can dose by itself. Reef Fusion 1 is the calcium part of a matched two-part system meant to be dosed with Reef Fusion 2 for tighter control in faster-growing tanks.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003e\u003cstrong\u003eWill it change my pH?\u003c\/strong\u003e\u003cbr\u003eReef Fusion 1 is formulated to raise calcium without spiking pH. Dose gradually and test, especially in smaller water volumes.\u003c\/p\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003e\u003cstrong\u003eWhich size should I buy?\u003c\/strong\u003e\u003cbr\u003eNano and small reefs do well with the 500 mL or 1 L. Larger or SPS-heavy systems that dose daily get the best value from the 2 L or 4 L.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"500 ml","offer_id":48731242954971,"sku":"1203","price":8.92,"currency_code":"USD","in_stock":true},{"title":"1 L","offer_id":48731246264539,"sku":"1207","price":14.32,"currency_code":"USD","in_stock":true},{"title":"2 L","offer_id":48731242987739,"sku":"1208","price":21.44,"currency_code":"USD","in_stock":false},{"title":"4 L","offer_id":48731246297307,"sku":"1209","price":32.33,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/1203-Reef-Fusion-1-500-mL.png?v=1777547554","url":"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-1","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}