Currently, my CH is at 800. Last year at this time, CH was 500. The last time I did a D&RF was 2 years ago. Fill water CH ranges from 170-200. It appears that I'm picking up about 300ppm/yr.
Today's numbers are:
pH: 7.97 (dropped to 7.5 just after test)
TA: 80 (should drop to ~65 after MA)
CSI: .17 (should drop to -.32 after MA)
What do the experts recommend?