What size tank does a common goldfish need?
At least 75 gallons (284 liters). The smallest standard tank that works is the 75 gallon. A bigger tank is always easier to keep stable. We give the size for an adult fish, because the small fish in the shop will grow. Scientific name: Carassius auratus.
How many common goldfish in each tank size?
This is how many each standard tank carries comfortably if common goldfish are the only fish in it. Share the tank with other species and the number goes down.
Keep one common goldfish per tank, whatever the size. Of the common sizes, these are big enough: 75 gallon, 125 gallon.
Check common goldfish against your own tank and other fish
Good to know
- Grows to 30 cm: a pond fish, or a 75 gal (284 L) tank at the least.
Tank mates for common goldfish
Common goldfish do best with other common or comet goldfish, in a pond or a very large tank. They need cool water and eat any fish small enough to swallow.
Questions and answers
What size tank does a common goldfish need?
At least 75 gallons (284 liters). The smallest standard tank that works is the 75 gallon. A bigger tank is always easier to keep stable.
How many common goldfish should be kept together?
One is fine. A common goldfish does not need company, though a large enough tank can hold more than one.
Can common goldfish live in a 10 gallon tank?
No. Common goldfish needs at least 75 gallons (284 liters), and grows to 12 in (30 cm), far too long for a 20 inch tank.
What temperature do common goldfish need?
50–73 °F (10–23 °C), with a pH of 7–8.4. In a normal room that usually means no heater.
Can common goldfish live with a betta?
It is not a good match. Common goldfish do best with other common or comet goldfish, in a pond or a very large tank.
More fish
Adult size, tank size and water ranges follow the mainstream care consensus (Seriously Fish species profiles and FishBase maximum lengths). Where sources differ we use the more cautious figure. Stocking numbers come from our stocking calculator.