What Size Tank Does a Tiger Barb Need?
Minimum tank: 20 gallons
A Tiger Barb (Puntigrus tetrazona) grows to about 3 in (7.6 cm), so the practical minimum is a 20-gallon aquarium. Because the Tiger Barb is a schooling fish, keep at least 8 together — a shoal needs more swimming room than one fish, so size up for a full group plus tankmates.
| Single fish or pair | 20 gallons |
|---|---|
| Comfortable group | 30 gallons |
| Community setup | 30 gallons+ |
Bigger is easier: more water dilutes waste and holds temperature and pH steady. See stocking ideas for a 20-gallon tank or try the stocking calculator.
Frequently asked questions
What is the minimum tank size for a Tiger Barb?
At least 20 gallons. Keep a group of 8+, which prefers something larger.
Can a Tiger Barb live in a smaller tank?
Going under 20 gallons stresses the fish, worsens water quality and shortens its life — not recommended.
More on this species: Tiger Barb full care guide · tank size · temperature · pH & hardness · tank mates