This was our first attempt at a pond. We get so much enjoyment out of this pond. Everyone who visits can't believe how tame the Koi are. They love it when you "pet" them. We enjoy it so much we are starting a Larger (17,000 gal) pond in the sping of "05" We have 22 fish who need a bigger home. Our 3 largest Koi are 20+ inches.