Minerals ion cartridge brings you clean and crystal clear spa water without high levels of heavy chemicals.Active ingredient is zinc.(inert ingredients are vitamin c,calcium sulfate,zeolite,attapulgite-type clay,zinc oxide and magnesium oxide.)A difference you can see,smell and feel,spa mineral cartridge improves water quality.Easy to install and low maintenance,compatible with most spa maintenance products.Mineral filter stick is a uncomplicated option for you,enjoy your relaxing spa experience with a mind at ease.Controlled mineral ion release technology, automatically dissolving trace amounts of mineral elements into the water.Mineral Stick works with existing filtration system,designed to fit most spa and hot tubs filters,available for 24 hours flow.",Products from GuanGuan's store Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.