Well it's getting better the last couple of days. The water is blue-ish, but it's not clear with a lot of white cloudiness in it. I can ALMOST see the bottom today, so every day is better.
I did find a couple of issues. First off, there was a lot of debris in the bottom that I hadn't found since I can't see the bottom. Larger leaves that are too big for the vacuum head when I vacuum I guess. So with the water getting a little clearer I can see dark shadows on the bottom and so I got most of them I think. The other issue was with backwashing. As I vacuumed, at least 2 or 3 times I had to stop because the filter stopped up and water flow went to nothing. So I'd stop, backwash, and start again. Then I'd add water every day and go again. Well, by all the backwashing I washed out my stabilizer! It had been just right when I started, but by about a week in it was really low. So that's why I was using so much chlorine. So that should be ok by tomorrow. I'm adding about 1 to 1-1/2 gallon per day now, and the overnight chlorine test two days ago was using 4 ppm, and last night it was 2 ppm. So nearly ready to add salt and start up the system normally again I think.
I did make a small mistake. PH was very high, so I added acid. As I was adding, I sort of forgot I was adding acid and not chlorine, so I added 1/2 gallon before I caught myself. Now PH is 6.9 or so. Maybe I could add borax to bring it up, or just ignore it for now?