Should I use ozone or UV for my pool sanitation?

UV is the safer bet for actual sanitation because it kills bacteria, viruses, and protozoa instantly as water passes through. Ozone oxidizes organic contaminants like sweat and oils, improving water clarity and reducing chlorine byproducts, but it’s less consistent. Most serious pool setups combine both, but either way you still need a residual sanitizer like chlorine or bromine.