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Price: $115.95

This replacement cartridge is used in Hot Spring spas with the AutoFresh system installed.  Dispose of the old cartridge (found attached to the underside of the filter lid) and simply install the new AutoFresh cartridge.

 

The cartridge contains a chlorine-and bromine-free sanitizer, shock, and waterline control (made by BaquaSpa).

 

Each cartridge lasts about three months, varying based on spa size and usage.