I put about a dozen full grown adults in the pond, Half acre. I might put more , no real predators yet in the pond yet so Im hoping they will just reproduce quickly. I wish I had kept all the fry that got purged(It was several hundred). As easy as they are to keep I could have gotten them just big enough so the GAMs could not eat them and release them. Hoping a couple of the adults still had eggs or fry holding in their mouths.