Natural Chemistry Spa Purge attacks the root cause of most spa maintenance problems...the build-up of organic waste contamination! Organic contaminants like oils, lotions, cosmetics, hair products and sweat concentrate in spa water to produce scum lines, cloudiness, clogged filters, bad odors and foaming. These contaminants collect and build-up in your spa, circulation system and filter. By purging the spa of this organic build-up, the symptoms of contamination will be reduced or eliminated. Spa Purge restores spa plumbing to its original condition. Cleans where you can't!