That's good to know. The ph had climbed back up near 7.5 again, so I just put in another quart of acid. This morning the readings were better.

FC-14
CC-1.5
ph-7.4 (a guess, but close, a lot redder than 7.2 where it was at 7pm)

Last night, I turned the sprayer head into the pool basically straight down and it drives the streams into the water several inches. From what I read in the other thread, this will aerate the pool better.

The main drain is visible now and the water is getting some sparkle to it. Finally.