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Koi

Cyprinus rubrofuscus

Koi (Cyprinus rubrofuscus)

Photo: Wikipedia / Wikimedia Commons

A pond animal. If it is in a glass box, it is in the wrong place.

Pond animal.

Pond fish only as an adult — needs 1000+ gallons and does not belong in an indoor aquarium.

In the tank

  • None in a glass box.
Water
freshwater
Temperament
Peaceful
Swims
All levels
Adult size
24 in
Minimum tank
1000 gal
Group
Can be kept singly
Temperature
50–77°F
pH
7.0–8.5
Diet
Pond pellets. Not aquarium food.
Beginner
Not a first fish

How to keep them

  • 1000+ gallons outdoors.
  • If it is in an aquarium, it is in the wrong place.

Tankmates

Other pond fish, in a pond.

Avoid

Indoor aquariums.

Check tankmates · Stocking calculator

Same group