Orenda PR-10000-PT Phosphate Remover Concentrate, 1-Pint Phosphate remover concentrate is the strongest phosphorus control product It is a highly concentrated solution formulated to react with phosphates in pool water and water-born It helps prevent interference with chlorine sanitizing and disinfection caused by algae It will not either effect water chemistry parameters or create residues detrimental to water quality Comes in 1-pint container