I have a 3/4 acre pond and am happy with mine. I have high nutrients and have had fish kills when the water would get low without the windmill. Maybe four years with the windmill and have not seen any dead fish. We haven't been as dry lately and there could be other factors but I think it has something to do with the windmill. I got mine from Malibu Water Resouces (advertised in Pond Boss Mag.) because it was the cheapest I found. BTW, it was a pain in the #%&^* to put together.
