Phosphate Remover: The Natural Chemistry Pro Series PhosREMOVE makes reducing phosphate levels easy. Keeps Phosphate Levels to Zero: PhosREMOVE reduces high phosphate levels with and can also be used as a maintenance product to keep phosphate levels near zero. Directions: Backwash/clean filter, test, and maintain proper chemical levels. With the circulation system operating, slowly add PhosREMOVE directly to skimmer, gutter, or surge tank. Vacuum if required. Backwash/clean filter as necessary (or within 48 hours). Application: Apply in accordance with your state and local pool regulation. Removing high phosphate levels may temporarily cause pool water cloudiness/turbidity. For high phosphate removal, it is recommended to divide the initial dose into at least three separate applications to reduce the possibility of turbid or cloudy water. Retest phosphate levels after 48 hours (repeat as necessary). Tested and Proven Effective: Natural Chemistry products are known for delivering reliable results and making water care less complex. Natural Chemistry carries an extensive line of pool and spa solutions that match your unique needs. Natural Chemistry PRO Series Pool phosREMOVE - 1 Gallon, 4-Pack