Unlike other tubs, we believe in having the most natural tub possible – without harsh chlorine that can be hard on the plumbing, as well as our bodies. The mineral ionizer naturally produces three key minerals; silver (natural sanitizer), copper (natural algaecide), zinc (skin conditioners). The ozonator produces 03. This is one of the worlds most powerful oxidizers, and destroys all organic matter found in the tub such as oils and dead skin. By removing any organic matter, there is nothing for bacteria to feed on in the hot tub. We have been using this combination successfully for 20 years to provide our customers with the best and cleanest water with out harsh smells and burning eyes of chlorine.