Needing to add a lot of Acid


Gold Supporter
TFP Guide
Jul 21, 2013
Northern NJ
It is normal for the TA you have. Lower your TA towards 60.

What is the pH and TA of your fill water?

At what pH do you lower it to what target?

Please Create Your Signature - Further Reading It helps us help you better.


Sep 20, 2019
Thank you. I will lower my TA. pH is usually 7.8 and I add acid as suggested by Pool Tools app. My goal is to lower it to 7.4 or 7.6. Also, I created a signature - thanks for that tip. Pool has been filled from well, but if that's the issue, I can use city water to fill.
Last edited:


Gold Supporter
Jun 28, 2017
Fresno, CA
I too have high TA fill water but now only add acid when I add water because of evaporation. My pool is stable at a pH of 7.8.
I would suggest keeping a close eye on your CSI (calcium saturation index) and not driving your pH down to 7.4 with the goal of keeping it there.
  • Like
Reactions: wille


Mod Squad
TFP Expert
LifeTime Supporter
May 11, 2014
Franklin, NC
My gut feeling is that you are trying to force your pool to a "low" pH when it would be happier at 7.6-7.8

First, how old is your pool?

What is your TA?
  • Like
Reactions: wille