Seachem Reef Fusion 2 and Reef Fusion 1 are the foundation of a system formulated to provide the essentials for a reef aquarium. You should purchase Seachem Reef Fusion 1 to use in conjunction with Reef Fusion 2. Reef Fusion 1 provides calcium, while Reef Fusion 2 provides alkalinity. When used as directed, Reef Fusion 1 and Reef Fusion 2 will maintain the critical levels of calcium and alkalinity necessary for healthy coral growth, while providing biologically appropriate levels of other elements and trace minerals.
