Bass feed by sight! Think of how many bullhead they could clean up if the bass could actually see them!

My guess is your past flood and related silt is not the culprit. That silt once settled would create little problems with day to day turbidity.
Something is stirring the bottom. The most likely culprits in order (in my opinion) would be #1 crayfish (Lousiana has to have native crayfish that found their way into that pond??) They keep the water looking like coffee with heavy cream as long as the water temps are warm enough for them to move. #2, catfish, #3 possible aeration (you didn't mention if you had this?)