Phosfree Extra Strength is specifically designed for high level phosphate removal. It works on both the filter and in the pool to ensure maximum phosphate removal.
Quickly Reduces High Phosphate Levels
Directions for use: 1. Clean or backwash filter. Make sure DE filters are properly cleaned and charged with DE before adding product. 2. For phosphate levels over 1000ppb, add 32oz (1L) per 10,000 gallons. DO NOT add more than 48oz. (1.5L) at a time. 3. Shake bottle well prior to application. With circulation pump running, add the recommended dose to skimmer. 4. Some clouding may occur. Run the pump and filter for 48 hours continuously without backwashing or cleaning the filter. 5. After 48 hours, vacuum to filter. 6. Backwash or clean filter. 7. Retest the phosphate level. Repeat steps 1-6 if necessary.
For DE and Cartridge Filters: Do not add more than 48oz (1.5L) at a time. If more than 48oz (1.5L) is needed to treat phosphate level, be sure to clean or backwash the filter between treatments.
Important: Retest water after each completed treatment. Repeat until phosphate level is below 100ppb.
NOTE: Algae must be treated prior to testing and treating phosphates. Chlorine must be under 5ppm before testing for phosphates.