My fill water is around 375-400 CH.
I know that refilling water is one way to get high levels down. The other is to keep the TA and PH lower.
With southern California in drought conditions, it doesn't make sense to constantly drain\refill as the CH rises. Do some of you live with high CH and just scrub calcium scale?
Note: not sure if the rise in CH is because of new plaster. I'm only using liquid bleach btw.