FreshWater Silver Ion Cartridge Chemicals One cartridge lasts about four

One cartridge lasts about four months

Use these test strips to monitor your spa's MPS (oxidizer)

The FreshWater Ag+ continuous silver ion purifier minimizes the amount of chlorine needed

The HotSpring® 31114 Filter Cartridge is a replacement spa filter for 65 sq

FreshWater Silver Ion Cartridge Chemicals One cartridge lasts about fourThe FreshWater Ag+ continuous silver ion purifier minimizes the amount of chlorine needed. It sends silver ions into the spa water that prevent bacteria from growing. It releases the ions automatically, so there is no chance of over or under dosing. Simply install the cartridge and change every four months.