I had a 10 gallon tank when I was a kid that had whatever I caught out of the golf course ponds near my house. It always had a few 2-4" bluegill, baby bullheads, ghost shrimp, little crawfish, turtles, and a baby LMB every now and then. I traded a neighbor bigger crawfish for guppies to feed the LMB, his oscars loved crawfish. Everything else ate whatever I put in: fishfood, plants, each other, bread, you name it. I just put them back in the ponds when they got to big. It is to bad kids don't get to wander off with their friends, a fishing pole, a dip net, and a five gallon bucket these days without their parents fearing for their lives.
