I know your onto the solution to better temps and better DO WB with a larger system. My aeration system is currently turning over the pond almost 5 times during the 8:30pm to 10:30am schedule. I believe this is contributing to the turbidity issues. I can get more turn-overs by lowering the 3 diffusers to a foot off the bottom, but, again, turbidity. If I drop the diffusers to the bottom, I estimate that I can turn the pond over about 7 times in the current 14 hour run-time. So, I'm in a pickle I guess. My goal is to get between 24 and 36" visibility with good DO levels and to understand my pond more. My pond is throwing the "one turn-over per day rule of thumb" back in my face even at near 5 times at night. Do I need to actually hit the one turn-over per day rather than exceed it? Maybe?
I am working on taking crawdads out to reduce the muddy waters, but don't want to eliminate them. Once I get some clarity, maybe I'll start dropping the diffusers back down for more water movement.
