BIO-DEX PHOS04 1 gal Bottle Phosphate Remover 4 per case. Phosphate Remover is formulated with the best natural ingredients that eliminate phosphates on contact and the water problems that high phosphate levels can create. High levels of phosphates can create a variety of water problems including water discoloration. Use Phosphate Remove as part of your regular maintenance routine to help maintain ideal water conditions and keep your pool water sparkling!