I'm not intending to hijack this thread, so if I am better starting a new one, please let me know.

I'm reading this and a bit confused. Currently (and I have found myself in this situation before), I have high alkalinity (between 190 and 210 -- it is hard for me to determine just WHEN the red officially turns blue). With a low PH: 7.2. My numbers remain pretty constant thruout the season (MN). But now I have to address the alkalinity again. I had to add a ton of acid back when we first got our pool. We have well water, etc. etc. .

Today, I added muriatic acid and plan to aerate. So, am I to expect, based on what you've explained here, that my PH will plummet? That didn't happen last time...
Jennie Menke