Seachem Reef Fusion 2Seachem Reef Fusion 2 is specially formulated to supply your tank with the essential carbonates, bicarbonates and alkalinity to help your corals grow. This is the second of the Reef Fusion system that helps maintain proper alkalinity for a healthy live reef environment. Maintains proper alkalinity levels for healthy coral growth 2 part Reef Fusion system maintains calcium and alkalinity levels Supplies tank with needed carbonates, bicarbonates and