Minerals ion cartridge brings you clean and crystal clear spa water without high levels of heavy chemicals.<br> Active ingredient is zinc.(inert ingredients are vitamin c,calcium sulfate,zeolite,attapulgite-type clay,zinc oxide and magnesium oxide.)<br> A difference you can see,smell and feel,spa mineral cartridge improves water quality.<br> Easy to install and low maintenance,compatible with most spa maintenance products.<br> Mineral filter stick is a uncomplicated option for you,enjoy your relaxing spa experience with a mind at ease.<br> Controlled mineral ion release technology, automatically dissolving trace amounts of mineral elements into the water.<br> Mineral Stick works with existing filtration system,designed to fit most spa and hot tubs filters,available for 24 hours flow. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store