Pond Boss Forums STOCKING A NEW POND Types of fish to choose Catfish as predators on bluegills etc.

I appreciate all of the information. One last question (or two). About how big does a catfish need to be to be a good predator on 4" bluegills? On the top end of this question, about how big of catfish will start to eat 10" bass? This would give me an idea of what slot size of catfish that would eat the bluegills but not eat the bass.