Designed to help prevent the build-up of foam in your Lay-Z-Spa Hot Tub, that is usually generated by shampoo, deodorants & your natural body oils. One way to help reduce this foam is in the shower before you use your hot tub, however foaming can occur due to some of the chemicals that are used to help keep your water clean & hygienic. The Antifoam will help your water return to its crystal clear appearance regardless of what has caused it. All warnings & instructions must be adhered to, which are clearly labelled on the packaging.