BIO-DEX PHOS+04 1 gal Bottle Phosphate Remover MAX 4 per case. Phosphate Remover MAX is the product to use to treat very high levels of phosphates in water and or large bodies of water. Phosphate Remover MAX 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 MAX as part of your regular maintenance routine to help maintain ideal water conditions and keep your pool water sparkling!