Nature 2 Continuous Silver Ion Cartridge

Freshwater continuous silver ion sanitizer is for Hot Spring Spas and Tiger River Spas ONLY. The Natural Alternative to Chlorine (and Bromine too!) Completes the Everfresh system. Lasts four months Makes spas easy to manage, halogen-free Improves performance of ozone-equipped spas Assures a healthy, safe, odor-free spa Significantly improves look & feel of water Simplifies water balance - it's unaffected by heat