I do have an aerator. I went with the 24' Koenders windmill. Seems to be working great. I have heard good things and bad about windmills. I guess I'll see how it goes. It sure bubbles up good in the pond. I introduced fathead minnows to the pond about a month ago. That is all that is in it at this time. I have structures like pvc pipes, a few stumps, and a roll of farm fence sunk in the pond. I will also sink a couple xmas trees this winter. I want to see how well the windmill does this winter. I have to admit it looks nice.