So I have attempted the bucket test. I calculated that 5mL (0.16 oz) chlorine in 5 gallons of water (15ppm) is equivalent to 5.5 gallons of chlorine in my 22,000 gallons. So my dose in my bucket is 5mL. Here are the results of my bucket:
Before any chlorine: PH – 8.0, FC – 1.0, CC - 18.5
After first dose: FC – 17, CC – 21
Second dose: FC – 32, CC – 33
Third dose: FC – 46, CC – 36

I figured the FC was high enough even though the CC wasn’t 1/4FC. So three doses at 5.5 gallons per dose is 16.5 gallons, but I added 14 gallons to the pool (a little more than 75%). Unfortunately, I used the entire 871 reagent durin the bucket test and before I could test the pool because the chlorine is so high. I’ll have to get some more tomorrow before I can test again. Hopefully Leslies has some.
These seem like some high chlorine levels! Does this seem like I am on the right track?