“We let the water circulate for a week, then we slowly add in the koi,” he says. They typically come in transparent bags and ...

deep. Plan the size around for the number of fish you'd like to keep. The rule of thumb: One koi per 250 gallons of water. For a pond 6- by 8-ft. and four feet deep, you could easily keep five or ...

There are regular competitions to name the top koi. Judges and buyers pay attention to how healthy its skin looks, its size and body shape, and how gracefully the fish moves in the water.