{"product_id":"seachem-reef-fusion-2","title":"Reef Fusion 2 — Alkalinity 4400 meq\/L 2-Part System 1 L, 2 L and 4 L - Seachem","description":"\u003cp\u003eSeachem Reef Fusion 2 is an alkalinity supplement based on a concentrated blend of carbonates and bicarbonates at 4400 meq\/L, designed to restore and maintain alkalinity in reef aquariums. It is part of the Reef Fusion system, the most concentrated 2-part system on the market, formulated for easy dosing in a 1:1 ratio with Seachem Reef Fusion 1 (calcium). Available in 1 L, 2 L and 4 L.\u003c\/p\u003e\n\n\u003ch2\u003eMain advantages\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConcentration of 4400 meq\/L — the most concentrated 2-part system available\u003c\/li\u003e\n\u003cli\u003eSimple 1:1 dosing ratio with Reef Fusion 1\u003c\/li\u003e\n\u003cli\u003eProvides the carbonates essential for the growth of calcareous species\u003c\/li\u003e\n\u003cli\u003eCan be used separately to target alkalinity independently of calcium\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eUse in reef aquariums\u003c\/h2\u003e\n\u003cp\u003eReef Fusion 1 and Reef Fusion 2 form a complete system to maintain the critical calcium and alkalinity levels necessary for coral growth. Reef Fusion 1 provides 100,000 mg\/L of ionic calcium along with magnesium, strontium, boron, iron, manganese, and molybdenum. Reef Fusion 2 provides carbonate alkalinity at 4400 meq\/L. Together, they maintain an optimal balance while supplying biologically appropriate trace elements.\u003c\/p\u003e\n\n\u003ch2\u003eDosage\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDose every 1 to 2 days. Shake well before use.\u003c\/li\u003e\n\u003cli\u003eAdd 1 ml of Reef Fusion 1 per 25 L (6.5 US gallons) in a high-flow area. Wait a few minutes, then add 1 ml of Reef Fusion 2 per 25 L in the same way.\u003c\/li\u003e\n\u003cli\u003eEach dose provides 4 mg\/L of calcium and 0.176 meq\/L of alkalinity.\u003c\/li\u003e\n\u003cli\u003eMaintain calcium between 380 and 420 mg\/L and alkalinity between 3 and 6 meq\/L (8–17 dKH).\u003c\/li\u003e\n\u003cli\u003eDo not exceed 4 ml per 25 L per day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eManufacturer's precautions\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eNever mix Reef Fusion 1 directly with Reef Fusion 2\u003c\/li\u003e\n\u003cli\u003eAdd the two products to separate locations in the aquarium\u003c\/li\u003e\n\u003cli\u003eMake significant adjustments gradually to avoid shocking corals and invertebrates\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAvailable formats\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 L\u003c\/li\u003e\n\u003cli\u003e2 L\u003c\/li\u003e\n\u003cli\u003e4 L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy choose Reef Fusion 2 at ReefSolution\u003c\/h2\u003e\n\u003cp\u003eFor a complete dosing system, pair Reef Fusion 2 with \u003ca href=\"\/en\/products\/seachem-reef-fusion-1\"\u003e\u003cstrong\u003eSeachem Reef Fusion 1\u003c\/strong\u003e\u003c\/a\u003e in a 1:1 ratio — the calcium half of the same system. If you prefer powdered alkalinity, \u003ca href=\"\/en\/products\/seachem-reef-builder\"\u003e\u003cstrong\u003eReef Builder\u003c\/strong\u003e\u003c\/a\u003e does the same job without immediate pH impact. Track your parameters with the \u003ca href=\"\/en\/products\/salifert-kh-alkalinity-test-kit\"\u003e\u003cstrong\u003eSalifert KH\/Alk Test Kit\u003c\/strong\u003e\u003c\/a\u003e for precise alkalinity maintenance.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eCan Reef Fusion 2 be used on its own without Reef Fusion 1?\u003c\/h3\u003e\n\u003cp\u003eYes. Seachem confirms that both products can be used individually to adjust calcium or alkalinity separately if your system is unbalanced.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between Reef Fusion 2 and Reef Carbonate?\u003c\/h3\u003e\n\u003cp\u003eReef Fusion 2 is designed as a 2-part system with Fusion 1 in a 1:1 ratio, concentrated at 4400 meq\/L. Reef Carbonate is a standalone supplement at 4000 meq\/L with a pK of 9.0 that stabilizes pH at 8.3–8.4.\u003c\/p\u003e\n\n\u003ch3\u003eHow much Reef Fusion 2 should I dose per day?\u003c\/h3\u003e\n\u003cp\u003e1 ml per 25 L every 1 to 2 days, providing 0.176 meq\/L of alkalinity per dose. Do not exceed 4 ml per 25 L per day. Adjust frequency according to your test results.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"1 L","offer_id":38010618085547,"sku":"20304","price":26.99,"currency_code":"CAD","in_stock":true},{"title":"2 L","offer_id":47580609216683,"sku":"20305","price":37.99,"currency_code":"CAD","in_stock":true},{"title":"4 L","offer_id":47580609249451,"sku":"20306","price":48.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/products\/2reef_fusion1L_220d2b21-004c-419f-a670-7bea85406873.jpg?v=1773598032","url":"https:\/\/reefsolution.com\/en\/products\/seachem-reef-fusion-2","provider":"Reef Solution","version":"1.0","type":"link"}