Balboa Purezone P3 Refill Cartridge Cassette (3 Pack)

The P3 refill cartridge is specifically engineered for the Balboa PureZone water control system. 
It supports automatic analysis of essential water chemistry levels, including free chlorine, pH, and total alkalinity (TA). Once inserted into the PureZone docking station, the cartridge delivers consistent, accurate data to help maintain optimal water conditions in spas and wellness environments.