Update. Finally got around to putting another 200 lbs. of aluminum sulfate in the pond 2 days ago. Visibility went from 6 inches to 24 inches in about 10 hours and seems to be holding there. The pH started off at 8.2 and barely dropped to 8 when I checked today. The pond has that familiar green color again and I saw one of my skinny bass jump out of the water to try and catch a dragonfly this evening, so it must be getting easier for them to see. Response to feeding seems slightly better or maybe I'm wishful thinking. I turned the aerators back on tonight and started the water well since the pond is about 6 inches low. We'll see if either of those activities mucks up the water again. I'll update later this week. I'm going to buy my bass 5 pounds of fathead minnows for a treat.