I have a 1.1 acre pond, approx. 2.9 million gallons. Max depth is 12 feet. It is fed by a seasonal creek that usually dries up in summer. By late Summer the pond is only 6 feet deep.
I can add a small hydro system to produce DC power. I prefer a 24V DC power system. The simplest approach to aeration would be to run an aeration pump off of the batteries. Running 110V from the house is expensive, plus there are voltage losses when you run power that far.
Do you know of any aeration pumps that operate on 24V DC? My other choices, in order, would be 48V or 12V.
How many feet is the run? You can bury an air line shallow, and not have to trench as deep as an electric line, but I don't know how deep the irrigation system is.....
I've run air well over 1,000 feet to a pond......