Ozone kills all bacteria; this reaction is instantaneous as the gas mixes with water. The reaction rate is 3200 times faster than any known Method. The disinfection rate is constant. Ozone can be increased or decreased to any desired levels for effective treatment of water, and also destroys bad effects of chlorine. Ozone is found when a high voltage electric discharge is passed through air, the oxygen ionizes and ozone is formed. Ozone is powerful oxidant; it reacts chemically with cells to destroy them. Ozoniser is used to create a hygienic environment. Ozone is used as an ade-odouriser, de-colorized, fungicide, bactericide and algaecide.