My pond is in the same boat, it has slowly started to clear then another heavy rain event happens and it muddies it right back up. I have a fresh five gallon bucket on the dock to see how long it takes to clear on its own once again. I have my aerator running just running 4 hours a night hoping it will clear sooner. After the latest gully washer on Friday I am back down to 1" of visibility as of this evening but I am seeing some evidence of a bloom on the surface and my GSH are still eating a few pellets off the surface, every night the feeding gets a little better.
Stay tuned, I have 100 lbs of alum and 50 lbs of hydrated lime leftover from 5 years ago that I might try but don't really want too while my RES and GSH are spawning.
In case anyone is wondering, my "sexing RES project" is on hold due to muddy water.