Quote Originally Posted by mas985 View Post
What is your CH of your fill water? You mentioned that you refilled and your CH was 200 which indicates that is all from the fill water. That is fairly high and will build up over time. I have the same problem. When water evaporates it leaves the calcium behind and since the fill water has a fairly high CH, you are continually adding calcium.

If this is true that would explain exactly what is going on with my CH.I will measure the CH of my Fill water tonight and double check. I am not to far from you. I live in Manteca, CA. So I would expect the fill water to be similar.