Keith -
I think this is a great example of the potential pitfalls to running aeration and feeding - if at some point that stops then what might happen to the BOW and its residents? Be it shortage of funds or no juice (power).
This is why I've never put in aeration, chemicals, or a feeder. Tempted at times enough to research and spec out, but then I keep coming back to "just let Mother Nature run the natural order" and so I leave well enough alone.
