1. Minerals ion cartridge helps provide clean and clear spa water without high levels of heavy chemicals. The active ingredient is zinc, and the inert ingredients include vitamin C, calcium sulfate, zeolite, attapulgite-type clay, zinc oxide, and magnesium oxide. 2. Spa mineral cartridge improves water quality, offering differences that can be seen, smelled, and felt. 3. It is easy to install and requires low maintenance, being compatible with most spa maintenance products. The mineral filter stick is a simple option, allowing users to enjoy a relaxing spa experience with peace of mind. 4. Featuring controlled mineral ion release technology, it automatically dissolves trace amounts of mineral elements into the water. The Mineral Stick works with existing filtration systems, is designed to fit most spa and hot tub filters, and is available for 24-hour flow.