Bromine, ozone and hydrogen peroxide have been used successfully in the past with or without chlorine residual. Ozone is the strongest and most convenient disinfectant of all. Its stability in water is most convenient and it appears to be ideal. Present technology allows easy automatic maintenance of the appropriate ozone residual level. Ozone assists flocculation of organic waste materials, thus enhancing the effectiveness of sand filters.
Ozone directly decomposes organic waste by oxidation.
Unused ozone slowly decomposes to normal oxygen and remains dissolved in the water to the point of saturation. This makes the pool water clean, sparkling and appealing. Leaves no toxic residues in the treated water. Ozone is produced on site and does not require storage nor transportation. Such requirements are partially based on a 30 years old German DIN procedure and this frozen in time design has already been changed.