Did you measure that FC tonight? Did all the Cal-Hypo dissolve (that's why it's cloudy--don't worry about THAT for now)?

If so, it's now evening, then add 5 gallons of LC...I think you are fighting the organic, whatever it is. Check your FAS-DPD test in the morning, too--BEFORE you add more. If it's come up, you are making progress. But you'll need to add enough LC to get it to the shock level.

PATIENCE!