OK, I added the borates today by using MA & borax.
Prior to the additions, my tests were:
pH = 7.5
TA = 70
About 4 hours after the addition, my tests were:
pH = 7.8
TA = 90
I used the pool calculator to determine how much of each I needed to add.
According to the adding borates instructions, it says to wait 48 hours to test. I am assuming this is meaning to wait to test the borate level, but are my post pH and TA tests reliable?
I spent a long time getting my TA down and the pH back up that I am surprised that the TA had a net increase of 20 when the additions were supposed to have a net increase of 0 - or did I misunderstand something?