So, my thoughts on most things that do "multiple jobs" are that they don't all the jobs optimally. Have you considered both bottom aeration and a fountain? I was in a similar dilemma, but with a much smaller pond. My wife wants aesthetics, I want happy water. Instead of possibly sub optimally aerating with a fountain, I decided to (eventually) get the separate tools to do both. I now currently have a bottom aerator that runs 1 hour over night to perform an estimated just under 1 complete turnover per night. My wife is slated to get a fountain in the near future so that we both achieve our goals. We will have a rule that no one is in the pond while the fountain is on, and will also be able to control when the fountain has power. The fountain being for aesthetics, I find it to be a waste of money being on if no one is out there enjoying it, so I want to be able to control when it runs.


[Linked Image from lh6.ggpht.com]