Hi again, I'm working on getting the crud out. It appears to be working. The color has gone from a deep green to a light green. It's still got a lot of brushing and pool cleaner work to go, but i'm seeing progress.
I'm sure I've got 25,000 gallons, I actually added a full gallon of 12.5% to get my FC to 4.
2 gallons of 12.5% and a gallon of acid over the past 3 day, my ph is down to 7.4, but my FC/CC is only 3/.4. So I added another 2 gallons tonight of 12.5% to get that chlorine level up. I m considering some clarifier to get the finer granules to clump, but I'll wait to see how the weekend goes.