I looked into a windmill aeration system and being at the mercy of the winds was enough for me to go electric. The windmill systym would have cost me more than the electric system because of the size of the windmill I needed.

If the site is secure, I wonder what the price would be for a propane powered generator (on a timer) for the aeration system vs. running electric?

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).