Ozone actively breaks down Non-Living waste products in Pool water which can combine with chlorine to form unhealthy By-Products that can irritate skin and have been linked to asthma and other ailments. Use of Ozone reduces the demand for pool chemicals by up to 70% and allows the chlorine in the pool to work more effectively as a disinfectant. A recommended minimum level of chlorine or bromine must be maintained at all times.