Ozone replaces chlorine. In addition to this we add Sodium Bromide at 1Kg per 20,000 litres once a year. This improves the efficiency of the ozone. Algaecide is also required. We also recommend a non-foaming Blue Algaecide, which is a once-a-month treatment in summer and can be added every 3 months in Winter. None of these affect the taste or smell of the ozone swimming pool water which will remain neutral.