WQA Certified - SeaKlear Natural Clarifier for Pools,  1 Quart Bottle Best-in-class performance clears cloudy water within 24 hours Highest concentration clarifier provides the lowest cost per dose Environmentally friendly - This product contains recycled shells from the seafood industry that would have otherwise ended up in landfills Improves filter efficiency, Can't be over-dosed! WQA Certified (NSF/ANSI Standards 50 & 60) Naturally clarifies cloudy water Removes oils and oily scum Compatible with all sanitizing systems Makes cleaning filters simple and easy; biodegradable through enzymatic activity Treats 192000-gallon per quart of product