Nature2 SPA Stick Mineral SanitizerNature2 SPA works with your existing filter to give you clean clear water without high levels of chlorine. It is perfect for spa owners looking for an eco friendly low maintenance alternative to heavy chlorine or bromine to keep their spa clean and free of harmful bacteria and viruses. Nature2 SPA uses an EPA approved mineral bed technology to effectively kill bacteria safely and effortlessly. It works by automatically dissolving trace amounts of