My house backs up to a pretty sizable pond. About 3-4 acres I'd guess. I live in indiana and typically you see large mouth bass, bluegill, a few crappie, and channel cats. You very rarely see anything else. I figured I'd be able to catch a few channel catfish no problem. After about a dozen attempts I've only managed to catch a ton of bullhead catfish which I've never seen anywhere else in indiana. I had to look them up to see what the heck they were. I don't typically like to mess with an ecosystem but I'm tempted to stock other catfish varieties. I heard big flat heads love to eat them but I don't know how well flat heads would do in a pond. Let me know what you guys think.