Fluval Sea 3-Ions Calcium, Magnesium & Strontium Aquarium Water Conditioner

• Concentrated supplement provides 3 essential ions–calcium, magnesium and strontium–at proportions that maintain optimal ionic balance
• Raises and maintains optimal levels of calcium, magnesium and strontium
• Supports coral growth, helps keep marine aquariums naturally stable, and offsets ongoing depletion caused by coral absorption, coralline algae and organic compounds
• Contains USP (Pharmaceutical) Grade calcium chloride, magnesium chloride and strontium chloride, and does not contain gluconates, nitrates, or phosphates
• High quality and ultra pure water conditioner that’s free of unwanted contaminates

Add 5 ml per 40 L (10 US Gal) once a week. Weekly dosage provides 10 mg/L of calcium, 1.5 mg/L of magnesium and 0.2 mg/L of strontium.