Update. The pond seems to be holding at 18 to 19 inches visibility with a 6" secchi disk. Aerators are now running 24/7 again. Fish activity seems to be picking up at the feed ring. I can see a few bass stalking the edge of the pond now. I threw in 2 sacks of crawfish for them to feast on yesterday. The greenish color sure is a whole lot more pleasing to look at than the milky white it had turned. I'll wait another week to see if the bloom gets better and maybe I'll fertilize a little. pH is still 8.0 or thereabouts.

Bobad, in your last post, did I understand you to infer that you put alum in a pile in your pond? Does that work? It would sure beat the heck out of the gyrations I have to go through to get the stuff sprayed on the water.