Just wounder what everyone is using? As I want to always have spares of everything with me, just in case.
Mine from the factory came with a CMax #maxetw-975
https://www.amazon.com/s/?ie=UTF8&ke...l_30df0qa2o2_e
Or I am also looking into a Culligan SCWH-5
https://www.amazon.com/Culligan-SCWH.../dp/B00KWJLCXS
Thanks for your feedback.