Natural Chemistry PHOSfree Purifier – 3 Liter (ltr)/101.5 Ounce (oz)

Use Natural Chemistry’s unique patented formula to reduce phosphate levels in a pool to near zero at initial fill or at season opening. The amount needed depends on pool size and phosphate level in the water.

• 1L/33.9oz treats 20,000 gal. pool with 300 ppb phosphates