I just read all 23 pages of this thread. (yes...all 23 of them!)
What if you can't get your TA down? No matter how hard you try? Even if I get TA down to 125/150, it'll jump right back up to 150-175 when I add fill water. (My fill water is that high.) I'm constantly aerating my water to try to force pH up so that I can use MA to bring them both down, but even aerating the water results in a minimal amount of pH rasie. (7.5 - 7.6 in 5 days of aerating.) Since the pool is so small, practically every backwash results in having to add water. (Unless I get lucky and get a nice rainfall!)
I've read something about a 'sweet spot' and I'm thinking this might be true of my pool. I've never gone through copious amounts of muratic acid. (Usually about 2-3 gallons a season.)
So..supposing that my pool has a sweet spot of pH holding in the 7.6ish range and a TA of 125, (which is probably about the best I can realistically get), could I add borates? I'm intrigued by the sparkling water, cleaner sides and wonderful feel.
But, if it's going to be something that might screw up that sweet spot of high TA and normal pH, then I might want to leave well enough alone and satisfy myself with less sparkling water, less wonderful feeling and having to clean the sides.
Before you ask, here are my numbers: FC 2, CC 0, ph 7.6, TA 175, CH 300, CYA 60 (waiting a week for the most recent add before retesting), Salt 3350.