Welcome to the forum!! I'm not an expert by any means...but have read a lot. Is there no way to get 110 volts anywhere near the pond? I know many have run black pipe or pvc a long ways to a pond so they don't have to run electricity.

I do not know about your climate, but you are trying to mix the water column when aerating. So your cooler water on the bottom, that doesn't have much if any dissolved o2 in it, gets pushed to the top, mixing with the warmer water that has dissolved o2. This will allow the whole water column to sustain life because all the water will have oxygen. That being said, when you run just during the day, your water will mix and eventually be close to the same temp all the way down. Here in the south that can be a bad thing when surface temps can get pretty hot. I would think with trout you would have to be careful of temps. Most of what I have read if you have to pick, says to do it at night after the sun sets then shut off when the sun rises. This actually cools the whole body of water, and adds o2. That doesn't help your problem I know.

Again welcome to the forum! Great place to be!