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For chlorine-based disinfection methods, the chlorine concentration is often adjusted to values between 0.4 and 0.6 mg/l. The chemicals used are calcium hypochlorite, sodium hypochlorite and. For public pools also chlorine gas is also used.
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Complimenting conventional disinfection with chlorine, disinfection or oxidation steps with Ultraviolet light and Ozone are also available. Both UV plants and Ozone plants can handle difficult conditions and/or reduce the use of sodium hypochlorite to a minimum.