Quote Originally Posted by DONNIE View Post
What would cause my CH to rise from 410 to 480 in 19 days? I have added nothing but bleach and muriatic acid in that time.

Temp 41
PH 7.6
FC 6
CC 0
CYA 60
CH 480
TA 70 (down from 80 in same period)
Salt 3600


Donnie
Is your pool gunite/concrete/plaster, etc? That can do it, ESPECIALLY if it's new. If it's a vinyl pool you should be ok, especially with your T/A so low. In a vinyl pool, if your CH reaches 500, and your T/A gets high then you can end up with cloudy water.

Let us know which it is.


And Chem_Geek responded first!