I'm trying to lower my TA (180), I am following the guide on here on how to do so. I am also using poolmath
Yesterday my pH (7.8) using the calculator I initially tried to lower it to 7.5 just to take it easy as this is the first time I have done this process. I calculated using the poolmath that I needed to add ~700ml of acid, which I did.
I retook the pH again an hour later with pump going, it appeared to not change at all (7.8), so I added a further 600ml of acid. Decided to leave it overnight. I also did an acid demand test which basically indicated I needed to add the same amount again.
This morning I checked pH (7.6) so it appears that despite the amount of acid I am putting in its not doing a lot.
I also notice when I entered the TA in pool math it readjusted the amount of acid I need (significantly increased it), I can understand this but I want to check if this sounds right before I go plunging more acid into the pool?.
Also on a side note can someone explain why aeration raises pH? just curious for my information