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?
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
23,158
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
1,026
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.
 
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