NATURE2 W28175 Express Above/In Ground Vessel Pool Mineral Sanitizer Cartridge

For above-ground or in-ground pools up to 25,000 gallons Easy, do-it-yourself installation, everything in one box B002IT5JRA Controlled Release Technology CRT ensures optimal mineral levels GUARANTEED, Kills bacteria, controls algae, wont stain Replacement mineral cartridge for all Express units Destroys bacteria and controls algae using natural mineralsYou may also like Nature2 Zodiac A30 W28165 Aboveground Mineral Cartridge Sanitizer 30K Gallon.