Natural Chemistry Phosfree 3L

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. Directions: Clean or backwash filter. Determine the appropriate dose. * See chart below. Shake the bottle well before application. With the circulation pump running, add a dose to the skimmer. Run the filter for 48 hours continuously without backwashing or cleaning. After 48 hours of filtering, clean/backwash filter. Retest phosphate levels, and if necessary, repeat steps 1-5. Dose per 10,000 gallons (38,000L)  Phosphate Level       PHOSfree Dosage 300ppb or less           0.5L or 16oz. 600ppb                      1L or 32oz. 900ppb                      1.5L or 48oz. 1200ppb                    2L or 67.6oz.