I don't think I spelled this out before, but I will now:

+ If the algae & debris doesn't settle after 48 hours with pump off, turn the pump back on -- it's not going to work that way.
+ Do NOT use the PAC (GLB product) until you are (a) able to throttle the flow OR (b) have a way (valve?) to throttle flow now. Do NOT push the PAC floc through the filter; that will make things worse.
+ If and when you have no more green ANYWHERE in the pool, you can let your chlorine levels drop to those matching your CYA level -- see the Best Guess chart in my signature for details.