We have another pond that is probably 2 acres that was full of little bluegill crappie bass and bullheads. Then we let go 7 northern in it that we caught out of a sandpit. It is amazing what those fish have done. Still catch lots of fish but the size is a ton better. Bluegills are around 8.5, crappies are around 11, and the bullheads are giant. Have a buddy with a pond that he let some muskies loose but nobody has ever caught them. Evidently they are still elusive even in a smaller body of water.With that size pond I'd add some muskies, just for fun.