BioGuard Anti Foam is an excellent way to remove annoying foam buildup in your pool, spa, hot tub or ornamental fountain, leaving your water crystal clear in seconds. Foam can build up because of lotions, oils, soaps, and other organic compounds left by swimmers or bathers and react with chemicals in your pool. Anti Foam’s powerful liquid formula neutralizes it quickly and can be used multiple times on especially heavy buildup without fear of any adverse reactions. Best of all, this product is made right here in the USA to ensure the highest quality, allowing you to buy with confidence.