Filter Cure is a liquid cleaner specifically formulated for the effective cleaning of Beachcomber’s Microfilter product. This is a phosphoric acid formula with a pH of .05, and is designed to remove Calcium buildup, or any other mineral deposits present in the water that accumulate in the Microfilter. These minerals hinder the filtration process and will dissolve with soaking in Filter Cure. Alternate the monthly Microfilter cleaning with Filter Pure for best results. Do not mix these products together as mixing will render them both inert.