QCA Ozonator Easy to install water purification device Creates ozone, a natural purifier Helps get rid of mold, mildew, viruses and bacteria Help keep your hot tub clean and safe with the QCA Ozonator. This easy to install home spa purification device creates ozone, a natural purifier that aids in getting rid of mold, mildew, viruses and bacteria. Using fewer chemicals than other types of water purifiers, the Ozonator helps remove unwanted bacteria and enhances the cleanliness of your home spa. Each Cartridge lasts 6 - 9 months on average Healthier, younger looking skin Softer, more manageable hair Fits easily into the Rainshow'r CQ1000 shower unit 30 Day Money Back Guarantee - Product ships out quickly Two Replacement cartridges for the CQ-1000 Rainshow'r Chlorine Filtration Systems. Rainshow'r Mfg Co was the first to use KDF (50% zinc and 50% copper) technology. This is now the industry standard. In the filtration process, the free chlorine recombines with a metal ion, changing the chlorine to a soluble zinc chloride, which washes out of the filter and is harmless to humans. Easy to install "pop-in" cartridges last 6 - 9 months on average.