Ozone
Ozone (O3) is a powerful oxidiser used in pool systems to reduce organic contamination, chlorine demand, and chloramine formation.
Definition
Ozone (O3) is a powerful oxidiser used in pool systems to reduce organic contamination, chlorine demand, and chloramine formation.
Typical Values: Reduces chlorine demand by 60–90%; Chlorine residual still required: 0.5–1.0 ppm minimum
In Plain Language
Ozone generators produce O3 from air or oxygen and inject it into pool water. Ozone rapidly oxidises bacteria, viruses, and organic contaminants. However, ozone breaks down quickly in water and provides no residual protection. It must be combined with a chlorine or bromine residual. Ozone significantly reduces the chlorine demand and chloramine formation in heavily used pools.
Why It Matters
Ozone can greatly reduce the chemical load on pool water, improving water feel and reducing chloramine odour in high-use commercial or residential pools.
Typical Values
Reduces chlorine demand by 60–90%; Chlorine residual still required: 0.5–1.0 ppm minimum
Last reviewed: 2026-06-01