Reef Advantage™ is equivalent to dry Reef Complete™.It is a buffered (pH 8.38.6) optimized blend of ionic calcium, magnesium, strontium, sodium, potassium, and other salts designed for reef aquaria supplementation. Unlike, limewater (Kalkwasser), Reef Advantage™ does not have a caustic pH and will not deplete magnesium or alkalinity. For each 100 mg/L calcium, Reef Advantage™ also delivers 10 mg/L magnesium and 0.5 mg/L strontium, proportionate to natural depletion rates (when used with Reef Builder™).To promote ionic balance characteristic of seawater, half a level teaspoon of Reef Builder™ may be used for each level teaspoon of Reef Advantage™. Reef Calcium™ and Reef Plus™ may be used for enhanced response. Use Reef Iodide™ and Reef Strontium™ in heavily stocked tanks.