What Size Tank Does a Chili Rasbora Need?
Minimum tank: 5 gallons
A Chili Rasbora (Boraras brigittae) grows to about 0.7 in (1.8 cm), so the practical minimum is a 5-gallon aquarium. Because the Chili Rasbora 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 | 5 gallons |
|---|---|
| Comfortable group | 15 gallons |
| Community setup | 15 gallons+ |
Bigger is easier: more water dilutes waste and holds temperature and pH steady. See stocking ideas for a 5-gallon tank or try the stocking calculator.
Frequently asked questions
What is the minimum tank size for a Chili Rasbora?
At least 5 gallons. Keep a group of 8+, which prefers something larger.
Can a Chili Rasbora live in a smaller tank?
Going under 5 gallons stresses the fish, worsens water quality and shortens its life — not recommended.
More on this species: Chili Rasbora full care guide · tank size · temperature · pH & hardness · tank mates