I would think TShad would be best at first, I have thought about bucket stocking these. The issue I worry about is introducing GS with them, and in my pond that could be an issue.
It is a shame you can not eat them since they can get to large size.
One thing that would be neat would be to grow some GS out in a pond for bait purpose. Just wondering what size of Catfish you would get on a jug line with a 2 pound GS as bait?
