Should I replace my water

[skydude]

Currently:
10.0 CL
7.8 PH
50 CYA
90 TA
900 hardness

According to the pool math app I should replace my water. If I do this I want to replace the water next month. My water is crystal clear and this past summer we had no issues at all (thanks to this website!) Should I replace the water or have pools with this hardness level been ok?

 

[Flying Tivo]

IF you are referring to Hardness as CH, not necessarily. You just need to manage your CSI accordingly by lowering your PH. Please share your poolmath app in your profile so we can see it.

 

[Rancho Cost-a-Lotta]

Your CH is on the high end of manageable and will only increase with top offs. I would drain to get CH into the low end of the range during the winter.