The usual rap against GSF is that they reproduce too fast, steal all the food from the other fish, and never get big enough to be worth catching. I like the aggresive way they hit lures, and it seems like they could be fairly easily controlled in a small pond by catching and keeping. I wonder why most species of SF are stocked more. Most get big enough to be fun to catch on light tackle, an SF pond should be relatively easy to manage if it is fished fairly hard, and variety is the spice of life.