It is. When I was on city water making 300g a month everything was used in pretty equal parts. I got 4 months out of both cation and anion resins probably could have gotten longer out of the cation, but I would just switch them out at the same time. Now if I made 300g I would have burned through the anion twice and cation would be untouched.Crazy. I mean. I don't mine changing it out every three months it's just interesting.
