Natural Chemistry PHOSfree 2L 4 Pack

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. Pack of 4.