Ok Taylor 2006 arrived and I put one dose of .5 gal muratic acid and 3 gal 6% bleach and results as follows:
( I have a 18' by 36' in ground with about 22,000 gal.

PH 7.6
TA 240
FC 1
CC 14

CYA -???? I could not get a reading. I put it the whole way to the top and no change