Here are this evening's numbers:
FC 0.5
CC 1.0
pH 7.2
TA 190
CH 130
CYA over 100

I opened the filter, stirred up the sand and backwash out lots of gunk.
Then added 60 lbs of sand to bring it up to the right level.

I pointed the return upward and now have a small standing wave rippling the surface.

I added almost 11 gallons of 6% bleach (7.5 jugs each with 1.42 gallons) and tested the water about an hour later.
FC = 4.0
CC = 6.5

Using the formula of 1 gal. increases chlorine by 2.3 ppm, this amount of bleach should have brought the chlorine up to 25. I added the remaining 6 gallons of bleach (4.5 jugs) and will test in the morning. If the 1 gal = 2.3 ppm applies, then this will only bring me to 21 ppm, but I'm out of bleach, it's late and time for bed. I'll test in the morning and report in.

My pH is 7.2 and it took 10 drops to bring it up to 7.4. Should I add a box of Mule Team borax now or wait until after the chlorine passes the overnight test?

Thanks!