Finally I have a old 3 legged windmill (40ft tall) that is mint condition and is fully functional. I need to find a place for it as it as it is not installed at this point. It will be primarily be used for looks, but I am wondering if it could be used for aeration?

So I'm open for ideas on trees and the windmill. Like I said it is in the idea stage now.
Well the idea stage has all of sudden become the soon to be installed stage. I found a gentleman who installs windmills for a living, so he is going to save me a lot of time and maybe grief. One of our options is to go back and dig a trench 4-5 ft below the water line and install a pipe and run to the location where we are going to install the windmill. From there we connect it to the windmill and then flow the water back to the pond.
So if i do this, what do I need to look out for and how do I seal the area where I put the pipe in the pond so it don't leak?