Reef Fusion 2 provides alkalinity. When used together with Reef Fusion 1 (sold separately) they are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1 provides calcium, while Reef Fusion 2 provides alkalinity.

• Add 1 ml of Reef Fusion 2 per 25 liters (6.5 US gallons) of water (for reference purposes, the cap holds 5 ml). Add this to a high current area of the tank. Wait a few minutes, then add Reef Fusion 1 in the same manner, 1 ml per 25 L (6.5 US gallons), after shaking well.