Unlike chlorine, which sanitizes and essentially kills bacteria, the enzymes in spa marvel hot tub treatment & conditioner help to remove the food (organic matter) necessary for bacteria to live, which is in part how lakes and aquariums can maintain themselves without using chlorine. There are three effective ways to drain your hot tub: 10 Hidden Uses Of Hydrogen Peroxide As A Cleaner Recipe Sanitize the area around your spa where the bacteria may be waiting to recontaminate the spa. What kills bacteria in a hot tub . While you may use chlorine or bromine to kill bacteria in your hot tub, it doesn’t kill it all. Hot tub care to prevent hot tub rash symptoms. Test the water before and after use. Chlorine only kills the free floating biofilm in the water and on the surface. It also actively repels insects, protecting the tub itself, but also helps keeping insects at bay to make your hot tub soak a pleasurable experience. Hot tub folliculitis typically heals without scarr...