Japanese koi are carp. These fish are generally expensive, but range in mature size from 2 to 3 feet, come in many colors, and live for a very long time. Koi are best suited to ponds larger than 6 feet minimum diameter and at least 18 inches deep. A good rule of thumb is to add no more than 1 inch (length) of fish for every 3-5 gallons of water in the pond.
These resources are brought to you by the Cooperative Extension System and your Local Institution
Welcome
eXtension is an interactive learning environment delivering the best, most researched knowledge from the smartest land-grant university minds across America.
Have a question? Try asking one of our Experts
Are there guidelines for the pond size acceptable for koi?
Last Updated: November 20, 2011
Have a specific question? Try asking one of our Experts
Unlike most other resources on the web, we have experts from Universities around the country ready to answer your questions.
