I bought a property with a 2-acre pond over the winter. Now that it's spring, I've had it shocked, only to find that it is populated with green sunfish (mostly 2" to 4" long). No catfish, and very few bass (although those that I have are big, thanks to the sunfish population). Absolutely no bluegill. The experts advice: kill the fish this fall, stock with bluegill, then follow that with bass next spring. I'm going to take his advice. But it was quite disappointing to hear the bad news.