{"product_id":"seachem-reef-fusion-2","title":"Seachem Reef Fusion 2","description":"\u003cp\u003e\u003cstrong\u003eSeachem Reef Fusion 2\u003c\/strong\u003e is the alkalinity half of Seachem's Reef Fusion two-part dosing system. It supplies carbonates to maintain alkalinity, along with magnesium and a blend of trace elements, giving corals the building blocks they need for steady skeletal growth and a stable reef. Available from a 500 mL bottle up to a 4 L value size.\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;\"\u003eWhy Reef Fusion 2\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaintains carbonate alkalinity, the buffer that keeps reef pH and calcification stable\u003c\/li\u003e\n\u003cli\u003eAlso supplies magnesium and trace elements used by growing corals\u003c\/li\u003e\n\u003cli\u003eDesigned as the anionic (part 2) component of the Reef Fusion two-part system\u003c\/li\u003e\n\u003cli\u003eDose alongside a calcium source for fully balanced Ca and alkalinity\u003c\/li\u003e\n\u003cli\u003eConcentrated liquid, available in four sizes from nano reefs to large 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;\"\u003eHow to Dose\u003c\/h3\u003e\n\u003cp\u003eAdd Reef Fusion 2 as directed for your tank volume to hold alkalinity in the ideal 7 to 11 dKH range, and pair it with a calcium supplement so the two stay in balance. Raise alkalinity gradually, no more than about 1 dKH per day, and test regularly. Heavily stocked SPS systems consume more, so dose to your tank's measured uptake.\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;\"\u003eChoose Your Size\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:480px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;text-align:left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;text-align:left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003e500 mL\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eNano and small reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003e1 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eMid-size reef tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003e2 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eEstablished reefs with steady demand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003e4 L\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eLarge or SPS-heavy systems, best value\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;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:520px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;font-weight:bold;width:42%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eSeachem\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;font-weight:bold;\"\u003eSupplies\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eCarbonate alkalinity, magnesium, trace elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;font-weight:bold;\"\u003eTarget alkalinity\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003e7 to 11 dKH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;font-weight:bold;\"\u003eSystem\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eReef Fusion two-part, part 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;background:#E0F7FA;font-weight:bold;\"\u003eSizes\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\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:8px;background:#E0F7FA;font-weight:bold;\"\u003eForm\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:8px;\"\u003eLiquid\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;\"\u003eKeep Calcium and Alkalinity in Balance\u003c\/h3\u003e\n\u003cp\u003eAlkalinity and calcium move together in a reef, so pair Reef Fusion 2 with a calcium source like \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-complete\"\u003eSeachem Reef Complete\u003c\/a\u003e. Prefer dry dosing? Reach for \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-builder\"\u003eSeachem Reef Builder\u003c\/a\u003e or \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-buffer-ph-alkalinity-83\"\u003eSeachem Reef Buffer\u003c\/a\u003e, and hold magnesium with \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-advantage-magnesium\"\u003eSeachem Reef Advantage Magnesium\u003c\/a\u003e. New to dosing? The \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/seachem-reef-pack-fundamentals-starter-kit\"\u003eSeachem Reef Pack: Fundamentals\u003c\/a\u003e bundles the essentials. Always dose to a test with the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/salifert-kh-alkalinity-test-kit\"\u003eSalifert KH\/Alkalinity Test Kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eBrowse the full \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/seachem\"\u003eSeachem collection\u003c\/a\u003e, more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003eAdditives \u0026amp; Supplements\u003c\/a\u003e, and everything in \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003eSaltwater\u003c\/a\u003e.\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;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need Reef Fusion 1 too?\u003c\/strong\u003e\u003cbr\u003eReef Fusion is built as a two-part system, with part 1 supplying calcium and part 2 supplying alkalinity. You can run Reef Fusion 2 for alkalinity and pair it with any quality calcium supplement, such as Seachem Reef Complete, to keep both in balance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat alkalinity should I target?\u003c\/strong\u003e\u003cbr\u003eMost reefs do well between 7 and 11 dKH. Pick a number in that range and hold it steady; stability matters more than the exact value.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I dose calcium and alkalinity at the same time?\u003c\/strong\u003e\u003cbr\u003eAdd them separately, a few minutes apart or in different areas of flow. Dosing concentrated calcium and alkalinity into the same spot at once can cause them to precipitate.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"500 ml","offer_id":48731262222555,"sku":"1213","price":8.92,"currency_code":"USD","in_stock":true},{"title":"1 L","offer_id":48731262255323,"sku":"1217","price":14.32,"currency_code":"USD","in_stock":true},{"title":"2 L","offer_id":48731262288091,"sku":"1218","price":21.44,"currency_code":"USD","in_stock":false},{"title":"4 L","offer_id":48731262320859,"sku":"1219","price":32.33,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/1213-Reef-Fusion-2-500-mL.png?v=1777547867","url":"https:\/\/squeakysaquatics.com\/products\/seachem-reef-fusion-2","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}