Thanks this is helpful.Ok so it'll make 1 FC in about 3.5 hours for you. Math that however you like for the same result.
100% for 3.5 hours = 1 FC
50% for 7 hours = 1 FC
25% for 14 hours = 1 FC.
Etc etc.
Once the FC drops, you'll want to start with 2 FC per day (as a local to you guess), and fine tune as needed.
I've got 3 pounds of CYA in a sock now, which brings me to a target CYA of 70, which without any more chlorine going in should make it safe to swim tomorrow if I"m understanding correctly that anything under SLAM level is safe.
I'll hold off on messing with the PH until things have stabilized, thought it was 7.8 last I checked before this and should be brought down some by the CYA addition.