Question: are koi fish good for ponds?
Answer: As with any backyard pond, a pond dedicated to keeping colorful Koi, can be a great way to keep fish. Ponds not only provide large habitats for your fish, but are also a pretty and relaxing spot for you in your yard. ... Koi can live in excess of 100 years, but typically, if well cared for, live 20-30 years.