Seachem REEF FUSION 1 & 2 500ml 1L Calcium and Alkalinity Coral Reef Marine Set
Seachem Reef Fusion 1. Maintain calcium level between 380-420 mg/L. Shake well before using. Add 1 mL of Reef Fusion 1™ per 25 L (6.5 US gallons) of water. (For reference purposes, the cap holds 5 mL.).