Enhance your spa experience with the Nature2 Zodiac W20750 SPA Stick Mineral Sanitizer. This 2-pack yellow cartridge is designed to provide clean and clear water in your hot tub, regardless of its type. The mineral sanitizer contains a unique blend of minerals that remove harmful bacteria and reduce the amount of chlorine needed. It is suitable for hot tubs with a recommended water volume of up to 500 gallons. The Nature2 Zodiac W20750 SPA Stick Mineral Sanitizer is easy to install and comes with the items included for your convenience. The mineral spa cartridge is made in the United States and has an EPA registration number of 67712-15. This product is perfect for those who want to maintain their spa's cleanliness without worrying about the condition of the water. Say goodbye to harsh chemicals and hello to a relaxing and refreshing spa experience.