Quickly Reduces High Phosphate Levels
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.
Natural Chemistry PHOSFree Extra Strength reduces phosphate levels in your pool. Phosphates are the limiting nutrient for algae growth. Reduce phosphates to near zero and enjoy an algae Free pool! Natural Chemistry® unconditionally guarantees it.
This product is designed for use in properly balanced pool water.
For DE & 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.