The Essential Book of Koi combines research from leading international authorities on koi with the captive-care techniques of experienced aquarists to yield the most up-to-date and extensive book available on the science, care, and breeding of these large ornamental fishes. This cutting-edge guide discusses topics that are imperative for sustaining a thriving family of koi, including how to create and maintain the best water quality, how different filtration systems work, the biology of koi and how to keep them in good health, and detailed information on feeding, buying, and showing. It also provides important details on the breeding of koi, a serious and rewarding pastime for many aquarists, and explains how koi are bred commercially as well as getting started at home. The fact-filled text is complemented by vivid, brand new photographs that detail the seemingly endless color variations of koi. Whether you are a hobbyist looking to show or breed koi in your pond, or you simply want to admire these fishes, The Essential Book of Koi is an excellent guide to these wildly popular fishes that enhance the visual enjoyment of both indoor and outdoor ponds.