Koi

Koi

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With many types of aquaponic fish available, you must put some thought into the purpose of the fish you choose. In aquaponics, some fish are raised to be eaten, and some are simply just to create a symbiotic relationship with the plants. Koi are not considered a good fish for eating, so for those looking to harvest not only plants, but fish as well from your aquaponics system, you might prefer a different fish such as Tilapia, Channel Catfish, Bluegill or a crustacean such as the Redclaw Crayfish or Prawns. Those who prefer not to harvest their fish may want to consider Koi.

Koi are one of the most popular fish used in aquaponics due to their long lifespan, their ability to easily live and breed in your system, their strong resistance to diseases and parasites, and of course, their attractive colors. We offer a variety of Koi in mixed-sex and color packages that may include white, black, red, yellow, blue or cream. Koi can survive in temperatures ranging from 35˚ to 85˚ F; optimal temperatures range from 55˚ to 75˚F. They do not react well to long, cold winter temperatures.

While a Koi fish can grow to as long as 3.28 feet, average lengths of up to 2 feet are more often achieved after four to five years if water quality and space in the tank are optimized. Koi also enjoy long lives, with lifespans ranging from 25 to 35 years. The common carp is a hardy fish, and Koi retain that durability.

Feeding is not recommended when the water temperature drops below 50 °F. Care should be taken by hobbyists that proper oxygenation, pH stabilization, and off-gassing occur over the winter in small ponds, so they do not perish. Their appetites do not come back until the water becomes warm in the spring.

Like most fish, Koi reproduce through spawning during which a female lays a vast number of eggs and one or more males fertilize them. When Koi naturally breed on their own, they tend to spawn in the spring and summer seasons.

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