Has anyone built thier own? It seems (I know Im a rookie) like it wouldn't be that hard. One manual from the MN dnr suggested a cheap and easy way to areate your pond would be to pump water out of the pond and then over a series of baffels on shore, letting it run back into the pond. One thing they noted about system like that, is you don't need to run it continuasly if the intake is above the hypolimnion. I suppose you could make a gizmo like this solar if you wanted.
