Goldfish & Coldwater
Koi
Cyprinus rubrofuscus
Also known as: Nishikigoi, Japanese Koi, Koi Carp
Colorful ornamental carp bred in Japan that can live for decades and grow past two feet.
- Water
- Freshwater
- Temperature
- 50–78°F
- pH
- 7–8.5
- Hardness
- 5–20 dGH
- Max size
- 24 in
- Min tank
- 1000 gal
- Temperament
- Peaceful
- Social
- Groups (3+)
- Swim level
- All
- Diet
- Omnivore
- Care level
- Intermediate
- Lifespan
- 25-35 years
- Breeding
- Egg-scatterer
- Suitability
- Kept but not recommended
- Origin
- Cultivated form (wild species: Amur carp, East Asia)
Koi are pond fish, not aquarium fish. They grow to 2 feet or more, produce heavy waste, and need a large filtered pond of roughly 1000 gallons or more. Keep in groups and expect them to eat and uproot plants.
