In The Swim Liquid Sand Filter Cleaner - 1 qt.
AIDS BACKWASHING TO INCREASE FILTER EFFICIENCY!Backwashing alone only removes large contaminants from your filter while oils, grease, and minerals continue to build up over time, decreasing your filters cleaning power. Add 8 oz. of Liquid Sand Filter Cleaner concentrated formula to your skimmer prior to each backwashing and you will eliminate caked-on contaminants providing better filter efficiency.