I have researched both windmills and solar aeration systems. I have concluded the windmill would not work on the most days it is needed the most. But on the other hand, there may be enough oxygen leftover from windy days. Solar system are very expensive and I can not justify the cost.

Water temperatures are in the 90's here. We have had one fish kill but like Bob Lusk said the water was hot and dirty. Have not had a fish kill in cleaner ponds.

Right or wrong, we have a water pump and a sprinkler set up to pump some pond water back into the pond. I know this probably not as good as an aeration system would be but mother is barking about the amount we have spent building our newest pond. Plus it would take aeration systems for ten various ponds.