Poolife Backwash Filter Cleaner (1 qt) is a fast-acting formula made for sand filters that removes built-up oils, minerals, and debris during the backwashing process—helping restore strong, efficient filtration without the need to soak the media. Simply add 8 fl oz through the skimmer while backwashing; it’s compatible with all sanitizer types and helps lower filter pressure, improve circulation, and clear cloudy water.