Minerals ion cartridge provides clean and clear spa water with reduced reliance on heavy chemicals. The active ingredient is zinc. Inert ingredients include vitamin C, calcium sulfate, zeolite, attapulgite-type clay, zinc oxide, and magnesium oxide. Experience improved water quality that is visible, odor-free, and pleasant to the touch. Easy to install and maintain, compatible with most spa maintenance systems. The mineral filter stick offers a simple solution for enhancing your spa experience. Utilizes controlled mineral ion release technology to gradually dissolve trace minerals into the water. Designed to work with existing filtration systems and fits most spa and hot tub filters. Effective for continuous 24-hour water flow.