Thanks for the info on the CH.

Yes, I would quit aerating when I reach the goal of TA=100. However, my wife likes the sound of gentle splashing from return, so I'll probably need to keep an eye on this level, and adjust as needed with baking soda.

Cal-hypo pucks available now, have a line in the ingredients "other chemicals, 4%" with no explanation as to what they are, so using them is a no-go for me. I want to know exactly what I'm putting in my pool!