I thought it was a cute little duck and got hopeful that I may have some submerged plants growing in the pond. I went and ID'd it on Google and found that all they eat is crustaceans, fish and amphibians. I haven't seen them for a few days - I think they didn't like the sound of me discouraging turtles with the BB gun.
I'm thinking about buying a diffuser aeration system from Northern Tool. I can keep the pump in the barn and run 300' of pex for airline to the pond. I can do this for way less than half of what I would spend to run power to the pond and buy a surface aeration system. May not be optimal, but I need to get some aeration going ASAP.