5 Things to Know About Ozone and UV for Pool Sanitation

UV kills microorganisms instantly UV light zaps bacteria, viruses, and protozoa as water passes through the chamber. It works only on water that flows past the lamp, with no residual protection.

Ozone oxidizes organic contaminants Ozone gas breaks down sweat, oils, lotions, and some chlorine byproducts, reducing the “pool smell.” It improves water clarity and lowers chemical load but dissipates within minutes.

Ozone is less reliable for sanitation Ozone is more about water feel and reducing chlorine use than consistent kill-everything reliability. UV is the safer bet if you have to pick one for actual sanitation.

Combining both is best for serious setups Most serious pool systems use UV and ozone together. UV handles sanitation, while ozone cuts down on chlorine demand and makes water feel nicer.

You still need a residual sanitizer Neither UV nor ozone leaves lasting protection. You must use chlorine, bromine, or another residual sanitizer to keep the pool safe between treatments.