SeaKlear Free & Klear, 1 Gallon Bottle Triple-Action formula combines our best-in-class Natural Clarifier, Phosphate Remover & Enzymes Removes up to 1,000 ppb orthophosphates Environmentally Friendly Ideal for weekly maintenance Perfect for salt systems - helps with out and extends salt cell life Recommended for weekly maintenance use Compatible with all sanitizers Provides a three-in-one formula: phosphate control with enzymes and a natural clarifier Removes at least 1000 ppb orthophosphates per 10000-gallon water Maintenance application, 4-ounce per 10000-gallon of pool water