Description
Reef Fusion 1 is the calcium half of Seachem’s two-part system. Alongside ionic calcium it carries biologically appropriate magnesium, strontium, boron, iron, manganese and molybdenum, so you are replacing the supporting trace elements corals consume rather than calcium on its own.
It is built to be dosed in equal parts with Reef Fusion 2, which keeps calcium and alkalinity moving together instead of drifting apart. Test both before you start, dose to your measured demand, and let a growing tank tell you when to increase. Stability matters more to coral than any single perfect number.
This size is the economical pick if you dose daily or run a larger system.
Not sure if it suits your setup? Ask our Reef Bot for help choosing, and we can help expedite your order.
Shipping & Returns
- Equipment and dry goods ship at their own rate. Free shipping at $349 or more applies to qualifying livestock only — corals, fish, inverts and live copepods. The $10 box & handling fee is a livestock packing fee and does not apply to dry-goods orders.
- All sales are final on equipment and dry goods. We are a retail store, not the manufacturer.
- Register your product with the manufacturer and keep your receipt — their warranty is how a faulty unit gets replaced, and they are faster at it than a shop could be.
- Not sure who to contact for a warranty claim? Call us and we will point you to the right place.
Ships from our Key West store · (305) 850-9949










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