HydraZone is a revolutionary new product for your spa and swimming pools. When combined with an ultraviolet system, HydroZone will take care of all your spa and swimming pool chemical needs. You will never need those other complicated chemicals again! HydraZone is made out of natural products and contains no poison, it works by sterilizing the water, thus preventing anything from growing. You can use HydraZone manually or with an auto-feed system. Manually you add HydraZone twice a week. With the auto-feed system, a small pump is installed and a predetermined amount of HydraZone is automatically injected into your pool or spa - making it the only hands-free system available on the market!