I finally got the aeration system installed.

https://easypro.com/products/sentinel-deluxe-aeration-system-complete-pa34-2-system-with-cabinet/

I am in the process of a startup cycle, doubling the run time each day. Only fathead minnows are in the pond right now. I am waiting to confirm everything is running OK before I cut the airhose to final lengths.

[Linked Image from i.imgur.com]

I added some soundproofing inside the cabinet with one inch of Owens Corning 703 fiberglass insulation board. I sprayed the top board with white Plasti-Dip just to keep some of the yellow fiberglass dust from falling on the compressor. I kept the cabinet cooling vents unblocked, of course!

[Linked Image from i.imgur.com]

I ran the airhose through underground 2" pvc pipe from the compressor to the pond shore to prevent accidental damage.

[Linked Image from i.imgur.com]