Watermom,
Thanks for the reminder about polyquat and chlorine depletion - I knew I forgot something.
I don't think this thread is going in circles, chuck9997's pool lost 1ppm FC and had 0ppm CC for the first time last night. I've advised him to maintain shock level for one more day and test overnight FC loss and CC again tonight.
Since it seems he's finally got the algae licked, we've started talking about clearing the cloudy water.