Overview Concentrated supplement offsets the rapid constant calcium depletion by coral, coralline algae, and other invertebrate growth. Easily absorbed by corals and other invertebrates for a strong skeleton structure. Fluval Sea Calcium supports the growth and condition of corals and other invertebrates by raising and maintaining calcium. 5 mL (.17 oz.) treats 75L (20 US gallons). Contains no gluconates, nitrates, or phosphates.
Instructions Add 5 mL per 20 gallons once a week. Weekly dosage provides 10mg/L of calcium.