TA and PH levels

poolmom21

Gold Supporter
Jul 27, 2021
148
Indio, CA
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
Ola , I have a question, at what PH level is it recommended to add acid? The PH on my water is 7.8 and TA is 100.
Should I add acid to lower the PH now and hopefully the TA adjusts. Or do I wait until PH is in the 8.2+ level to add acid?
The pool is not being used at all, I am just trying to maintain chemicals and maintain the pool clean.
Gracias!
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,320
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
What is your CSI? Keep that between 0 and -0.3. Poolmath will track your CSI.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,611
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
Poolmom, according to your Poolmath test logs from a couple days ago, your "CSI" is at about +0.64 which means your pool is susceptible to scale. So yes, use enough muriatic acid to lower the pH to about 7.2, then let it increase on its own back to about 7.8 - 8.0. Then repeat that process. Each time you do that it should lower the TA a little. You can repeat that process every 2-4 days or so until your TA gets down to about 60-70. Once the TA is down to about 60 - 70, just keep the pH at about 7.6 - 7.8 and you should do fine.
 
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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
44,320
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
 
  • Like
Reactions: poolmom21

poolmom21

Gold Supporter
Jul 27, 2021
148
Indio, CA
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
Poolmom, according to your Poolmath test logs from a couple days ago, your "CSI" is at about +0.64 which means your pool is susceptible to scale. So yes, use enough muriatic acid to lower the pH to about 7.2, then let it increase on its own back to about 7.8 - 8.0. Then repeat that process. Each time you do that it should lower the TA a little. You can repeat that process every 2-4 days or so until your TA gets down to about 60-70. Once the TA is down to about 60 - 70, just keep the pH at about 7.6 - 7.8 and you should do fine.
Ok. I just added acid to lower it to 7.2. When do I retest TA? Today or in 2-4 days when I retest PH?
 
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