Residential Water Care


Most Effective Way to Remove Phosphates!

Reducing phosphate levels in pools is easy with Natural Chemistry's patented Phosfree technology. Phosfree is formulated from lanthanum (rare earth) compounds. When added to the skimmer, a thin coating of Phosfree forms on the filter media. As pool water flows through the filter, phosphates are reduced to a very low level.

Phosfree® Image
  • Most effective way to remove phosphates
  • Works in the filter (no clouding of the pool water)
  • Reduces phosphates down to near zero
  • Reduces pool maintenance
  • No Phosphates - No Problems
Partner Products
Product Experience
  • Phosfree® Extra Strength

    • Specifically designed for high level phosphate removal
    • Easily maintains low levels of phosphates in even the largest volumes of water

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  • Pool Perfect® + Phosfree®

    • Add weekly to maintain near zero phosphate levels
    • Reduces waterline rings, unpleasant odours, and eye irritation
    • SMARTZyme technology reduces the buildup of non-living organic contamination

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  • Hasslefree Kit™

    • Cold water SMARTZyme™ technology works all winter long
    • Reduces existing or prevents off season waterline ring
    • Cleans and protects during the off season
    • Prevents metal staining and non-living organic staining
    • Saves time & money

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  • Pool Magic™ + Phosfree®

    • Provides fast, easy start-ups
    • SMARTZyme technology that is formulated for cold water application
    • Reduces waterline ring and phosphates

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Phosfree® Instructions

Directions for use:

This product is designed for use in properly balanced pool water.

  1. Clean or backwash filter.
  2. Determine appropriate dose. * See chart below.
  3. Shake bottle well prior to application. With circulation pump running, add dose to skimmer.
  4. Run filter for 48 hours continuously without backwashing or cleaning.
  5. After 48 hours of filtering, clean/backwash filter. Retest phosphate levels, and if necessary, repeat steps 1-5.

Note: If DE filter pressure rises to 10psi above start-up pressure, turn pump off for 1 minute and then turn it back on. If pressure remains high, backwash or rinse for 30 seconds.

Dosage Chart

Dose per 38,000 litres

Phosphate LevelPHOSfree Dosage
300ppb or less0.5L
900ppb 1.5L

For DE & Cartridge Filters: Do not add more than 1.5L at a time. If more than 1.5L is needed to treat, be sure to clean or backwash the filter between treatments.

Important: Algae must be treated prior to testing and lowering phosphates. Chlorine must be under 5ppm before testing phosphates.

Weekly Maintenance Dosage 1 cap (120mL) per 30,000 litres


Test For Phosphates


Available Sizes

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