CYA and low pH

ncpoolguy

Bronze Supporter
Jul 1, 2020
57
North Carolina
I added 4# of Clorox stabilizer to a skimmer with a sock in it. My pump runs 24/7. I checked it after 28 hours and it bumped my cya up accordingly, but my pH dropped from 7.86 to 7.52. I thought I had read cya doesn’t affect pH much. My plan is to aerate until it rises back up, but I’m curious if this sounds normal?
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
37,111
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
It did not effect pH much. No need to do anything special for your pH
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
21,229
Bedford, TX
Guy,

It has a very small effect on the overall pH of a pool.. Your pH of 7.52 is perfect, why would you want to change it???

There is just no reason to adjust your pH if it is between 7.2 and 7.9 .

Thanks,

Jim R.
 

mgtfp

Bronze Supporter
Mar 5, 2020
973
Melbourne, Australia
Pool Size
66000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Astral VX 7T
Sounds absolutely normal. CYA is an acid (that's the "A" in CYA) and does have a moderate impact on pH. Water will aerate on its own, no need to enforce it.