Bill,
Thanks for all the great info. I always feel like a have asked a good question when I get a long response from you.

So bottom aeration seems like something that should be done if at all possible for the overall health of the pond. I will be doing a search on that shortly, but do windmill aerators work sufficiently? I would be looking for something that is not electrically powered but effective.

I will definitely be re-reading everything. I have already re-read this whole thread a couple times and definitely found things that I missed the first time around. And I have reread parts of your "trophics" article already.

Thanks again for everyones help.

You've got to talk to the animals, sing ditties to the fishies - My Great Grandfather

Here fishy fishy fishy - Me