What is the best way to add a water pump to my farm pond?


I have a small farm pond that does not have free flowing water. It needs a pump to keep the water moving. The problem is that it is not close to an electrical source although it is possible to run electricity to it. It also has at least a foot of pond muck in the bottom of it so anchoring a pump in the middle of it would be hard to do. It is only about 4 ft deep in the middle of it and is approx 40 by 40 ft circle shape . I need also to keep the cost down. My main goals are to get oxygen in the water and to keep algae out and to control the muck. This pond is home to many frogs and fish. Any advice???

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