Thanks Theo. From further research here I don't think we would aerate in the winter here in middle Georgia. A bottom aerator sounds like the best way to start and add a fountain later, unless I win the lotto \:\)

I fairly certain we don't have electricity to the dam. The sprinkler system on the dam is controlled off of 9v batteries (Rain Bird Easy Rain controller) and there are no lights on the dam. I'll look into getting electricity to the dam when I get back to Georgia.