allright heres the scoop since i got a 50gallon tank for my afc's i need to stock my pond, the pond is roughly 30 gallons its a 28 inch octagon 12 inches deep. i dont want to have a top for it, so what ever i get for it cant climb or jump out. id like african butterflies but they tend to commit suicide and jump out of the tank, anyone have any ideas? something that looks cool from the top view. not goldfish either