How many koi can I keep in my pond?
Koi can grow very large, as long as three feet in some cases. While many small koi can be kept in a pond, the same pond will hold only a few large koi. The capacity of a pond is also very dependent on the type and amount of filtration the pond has. For most koi keepers, about 50 to 100 gallons per small koi (under 12), and 500 to 1000 gallons per large koi (over 24) is a good rule of thumb in a properly filtered pond. A good philosophy for collecting koi is to be very selective and have a smaller number of higher quality specimens.
