The E.S.V. B-Ionic Seawater System 100 Gallon Salt Mix with measuring supplies offers a superior solution for creating stable, contaminant-free saltwater in reef aquariums and tanks. This advanced system utilizes two primary salts—ultra-low heavy metal Sodium Chloride and USP grade Magnesium Sulfate—which undergo rigorous three-phase purification to ensure purity and consistency. The result is a safe, easy-to-prep seawater mix that minimizes chemical variations and provides optimal water conditions for marine life without causing irritation or harm.