BRS Pharma Magnesium Sulphate 7 lbs offers an ultra-pure magnesium additive for your reef tank. It helps maintain proper magnesium levels, achieving the essential balance of calcium and alkalinity in your tank by preventing excess calcium carbonate precipitation. Unlike traditional magnesium sulfate, BRS Bulk Magnesium Sulfate is a fine powder that dissolves crystal clear, with no excess water molecules, allowing it to dissolve faster. Additionally, it can be mixed with magnesium chloride without leaving any residues or undissolved salts behind. Crafted from pharmaceutical-grade materials, this bulk magnesium sulfate is designed for easy dosing, mixing fast and clear, and leaves no residue behind, ensuring optimal reef health and growth. Plus, buying in bulk allows you to save money, and the resealable packaging ensures freshness and convenience.