Thanks for the feedback guys.

I'd have to move the diffuser about 150 feet from where it is to get it beside the nearest shore. This would be safest but this stretch is maximum 6-7 feet deep...whereas dugout is 20 feet deeper than this.

Part of one of the spoil piles from the dugout isn't submerged and about 30 feet from the dugout. This might be a better bet? I wonder if a diffuser placed at a depth of 8-10 feet would circulate much O2 to the depths of my dugout 30 feet away?

What if I left the diffuser where it is and just raised it 10 or 15 feet off bottom? This way the fencing could stay where it is and in theory the amount of open water reduced.

Next year I will definitely set up closer to shore.