I started a trial of Bio-Active in my pool this morning, and per Divin' Dave's request I'm starting this thread to track progress.
Baseline chemistry at 9pm last night:
FC < .2
CC < .2
CYA 140 (1:1 dilution with tap water)
Added 128oz 10% chlorine at 9:30pm last night to get to the target 2-3 ppm range. 10:30pm test showed FC of 2.4
Test at 6am this morning, FC was down to 1 and CC ~ .5, so dropped in another 128oz of 10% chlorine near the return, and dropped in 16oz. of Bio-Active CYA Reducer in the skimmer.
Work and volunteer obligations mean I most likely won't be near the pool until much later, but will test CYA when I do get home.