FF,
You present a scary possibility. I built a somewhat smaller "put-and-take" pond a little over a year ago and stocked it with 150 HBG, 50 CC, and several pounds of rosey-reds/fatheads. Plus, I included two koi and 50 redeared sunfish (RES).
I was hoping that the CC would take care of any HBG/RES offspring. My plan was to add some hybrid striped bass (HSB) last fall, but I couldn't get any. If nothing else, I do plan to introduce a bunch of rainbow trout this fall.
I do know that the fatheads/rosey-reds have survived and thrived extremely well. They are just thick in the water when the feeder goes off -- but so are the HBG, which are quite aggressive.
Keep us posted. It will be interesting to see what you do, as I may have to follow right behind you.
Ken
