How have the vegans you know reacted to using fish and (partly) animal-derived fish foods as part of this system? My brother's vegan and would frown on the use of animal-derived products in growing food. He may be on the more extreme side of it though. I'd love to know more if you have extra opinions to share.
I've never regretted over engineering a system, but often regretted under engineering one.
What kind of growth rate are the anubias petite doing? I always heard you got fast (relative to anubias) growth above water. I never got to try it properly, but it'd be a great way to grow out enough for a tank. Hmm..
In franks setup I wouldn't worry so much but this is an interesting read for those who use local fish they catch for these kinds of projects. Especially since we share the same lake, it's an interesting read. Since they say it's found in the fishs intestance. http://www.seagrant.umn.edu/newslett...wild_fish.html