Ultraviolet light is a wavelength of light that is higher in frequency than the visible light spectrum. Like ozone, UV is typically used in addition to chlorine and bromine in commercial pools and spas; this is mostly because UV does not have a residual. The UV bulb sits inside of a tube that is part of the filtration system, so the only time the microorganisms are exposed to the UV light is when they pass through that system. In our pods, all of the water is filtered through at least five times between clients, typically more. Our tanks also filter all night.
There is a nice effect that happens when UV hits ozone gas, which is that something called Hydroxyl Radicals are formed. These are extremely short lived particles (less than a second) that are very effective at killing microorganisms, more effective than ozone or UV would be on their own.
Hydrogen Peroxide helps break down the bits of microorganisms that are left after they have been inactivated. In addition to being an oxidizer, H2O2 creates Hydroxyl Radicals when combined with UV.
Unlike Ozone and UV, Hydrogen Peroxide has a residual. One of the biggest benefits of hydrogen peroxide is that it simply breaks down into water and oxygen, and doesn’t result in any DBPs or other air quality concerns. As a result, a UV/peroxide system has the lowest chance of of having “side effects” that create inadvertent health risks for our customers.
Ozone is a powerful sanitizer, typically regarded as more powerful than chlorine and bromine. It’s sometimes used in pools and spas because of its ability to kill some things that chlorine/bromine can’t. Commercial pools and spas can’t rely on using just ozone by itself, because unlike chlorine and bromine, ozone doesn’t have a residual. Residuals are important in a pool due to the fact that there are many people swimming close to each other; however, residuals are not important for float tanks because there is only one person in the tank at a time.