SeaKlear SKZ-U-G Commercial Pool Phosphate Remover, 1-Gallon This phosphate remover is an easy-to-use treatment for effective and efficient phosphate removal Maintenance dosage are weekly use 1-ounce of phosphate remover per 5000 gallons of pool water to maintain phosphate levels below 125 ppb One quart removes at least 9000 ppb of orthophosphates per 10000 gallons of water Proven to eliminate phosphates from fertilizers, rainwater, soaps, decaying vegetation and other pollutants Alum-free, nontoxic formula 100 percent safe for your family and the environment