Bio-Dex Phosphate Remover Plus+ 1qtPhosphate Remover Plus+ removes phosphates immediately which will prevent problems associated with high phosphates such as discolored water. It works with all sanitizing systems, water chemistry and filter media. It won't adversely affect the chlorine levels in your pool. Swimmers can go into the water right after you use the product. Phosphate Remover Plus will help you maintain a phosphate-free pool throughout the year, which is one less thing to worry about when it comes to pool maintenance. You can feel confident using it because it's non-toxic and non-hazardous so it won't adversely affect swimmers.