Most biologists recommend against stocking crappie in ponds. They are in most ponds here in KS. For the first few years you get nice big crappie. Then in subsequent years you can watch the size diminish. It doesn't seem to matter how many we try to take out. Eventually you end up with a pond full of 4-6" fish. To end my post, great grandad always used to say "You never throw a crappie back in a farm pond, they just take over too quick".