I have had tremendous difficulty maintaining a low pH since the day my pool was installed. This is the 5th summer for our pool and still fighting pH > 8 at times. When closing, I have it balanced perfect except the rising pH (TA 90-110). I keep dumping acid in through out winter when I can get to the cover to bring it down. For 2-3 years I have been getting scale in the winter (scale stops at the winter water line). So, this year I have been tracking pH and how much liquid MA I have been adding. I have added almost 7 gal since May 1 of MA. TA at opening was 90. Since I have been adding MA, I have watched the TA slowly come down. Now it is 30-40 and I am able to hold a pH 7.3-7.4 longer without adding anything. Evan after large rains my pH is holding whereas before after a rain it would go above 8.
So, I know everywhere it says 90-110 TA to keep pH fluctuations. But I am finding the opposite. So, is there any harm having a TA 30-40 while the pool is maintaining balance? I still have scale everywhere so trying to hold a normal to low pH is vital to keep it down.