CH Question


Well-known member
Jun 15, 2019
Houston Texas
My CH has been 200 since I got my new plaster pool going in early June.
Was just rereading the recommended levels for CH for plaster pools and it's 250-350.
What specifically will happen to my plaster if I stay at 200?
I have some Cal Hypo shock i can use to bring that up....bought it when i first got my pool but have plenty left as I only used it once....that was before I found this site.
Can I put some cap hypo shock in to help raise my CH?
Seems like it can kill two birds with one my FC and CH...without having to buy stuff to raise my CH.
Thank you

latest test results
FC: 8
CC: 0
PH: 7.8
CH: 200
CYA: 80 ( i know i know...on liq chlorine now but waited too long to make the switch)


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
With your pH and TA your CH is not aggressive to water. But you can still raise it some if you would like to use cal hypo.