Randy,

Retired NASA, but still doing some consulting work.

There are numerous posts on this Board regarding the pros and cons of crappie. My opinion is that for your size pond and your objectives of a strong bass population and big Bluegill, the crappie are counter productive. They tend to overpopulate and reduce available forage for the bass. A healthy sizable bass population goes good with big bluegill, i.e. bass pick off the small bluegill leaving you with the larger ones for reproduction and continuing to supply the food chain.

As pointed out in an earlier post, aeration is probably of marginal benefit for your depth pond, but it certainly doesn't hurt. The one thing you can do that will provide real benefits relatively quickly is to start a feeding program and continue it through the growing season.