Natural Chemistry® 14230NCM 1 qt Spa Cleanse Weekly is a concentrated blend of naturally based enzymes and phosphate remover. It reduces unwanted non-living organic contaminants such as: body oils, cosmetics, suntan lotions, hair products and so much more! Cleanse Weekly​ reduces scum lines, scrubbing of the waterline, and unpleasant odors. It provides crystal clear, sparkling water with less work. Cleanse Weekly​ works as a continuous cartridge filter cleaner and removes unwanted phosphate contamination.