My pool's calcium Hardness keeps rising and I can't figure out why.
CC - 0
PH - 7.5
TA - 80
CH - 450-475
CYA - 80
On 9/25 CH was 270. On 10/11 CH was 390.
I'm using the TF-100 kit and tested CH twice today with readings of 450 and 475.
I have an auto-fill, but the tap water CH is only 125.
Any ideas? Thanks, Scott