SeaKlear 1040105 Phosphate Remover for Pools, 1 Pint Commercial Strength! One quart removes 9,000 ppb of orthophosphates per 10,000 gal of pool water Removes phosphates generated from fertilizers, cleaners, pool chemicals and other pollutants. For weekly maintenance and treatment Enhances performance of salt systems WQA Certified (NSF/ANSI Standards 50 & 60)