I understand how to get rid of TA, I've read the great posts by Chem_Geek on the whole "soda pop" analogy, but what makes my pool TA increase?
I closed it at ~80ppm TA and opened it at ~140ppm. During the winter I continued to add acid to maintain a 7.6-7.8 PH.
I'm in the process of running the spa (great aeration) and keeping the PH beween 7.0 and 7.2 and the TA is now dropping. I seem to go from 7.0 - 7.2 PH in ~3 hours.
So back to my original question. What makes my TA go up? Maybe I can capture the process and sell it to "fix" flat soda
Not sure if it matters, but my pool is ~10 years old.