Natural Chemistry PHOSfree Extra Strength - 1 Liter filter_length_25 Manufacturer Part # 520659

Manufacturer Part # 520659

Manufacturer Part # V38-185

6540­484 | 74407­98 Pleatco Part # - Square Feet 27 Unicel Part # -

R0536300 will fit PB4-60's with serial numbers after PB120111001 or beginning with AVEH050100

Natural Chemistry PHOSfree Extra Strength - 1 Liter filter_length_25 Manufacturer Part # 520659Natural Chemistry 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. Sources of phosphates include pool chemicals containing phosphoric acid, phosphonic acid and phosphonates (which include most metal removers and sequestering agents), personal hygiene products, soaps and detergents, plant debris, fill water, body fluids and waste,