Each Thermals Spas is equipped with a highly efficient, safe and durable ozone disinfection & purification water processing system. With a life not less than 5000 hours, the ozone generator is controlled by the central processor. Once set up, it can control the start, close and operation time of ozone generator. To attain the optimum purification effect, we suggest selecting different ozone operation times according to the volumes of different size Thermals Spas or different water quality. A conveniently located, double cartidge filters are offering double filtering fabric areas to achieve a more effective self-cleaning in your Thermals Spas.