What size tank does a Chili Rasbora need?

Chili Rasbora needs a minimum of 5 gallons, with 10 gallons recommended. They are middle swimmers. Keep in groups of 10+.

Is Chili Rasbora good for beginners?

Chili Rasbora is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Chili Rasbora?

Chili Rasbora is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 5-7, temp 72-82°F).

Chili Rasbora

Boraras brigittae

Family: Cyprinidae • Origin: Southeast Asia

Chili Rasboras are among the tiniest aquarium fish. Despite their size, a large school creates a striking display of red in a planted nano tank.

Min Tank

5 gal

Max Size

0.8"

Temperature

72-82°F

5-7

Lifespan

4 years

School Size

10+

Swim Level

middle

Hardness

1-8 dGH

peacefulintermediateomnivoreschooling

Is Chili Rasbora Right for Your Tank?

Chili Rasbora is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. At just 5 gallons minimum, they work well in nano tanks and smaller setups.

With a peaceful temperament, Chili Rasbora makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 10 together, or they may become stressed and display abnormal behavior. Expected lifespan: 4 years with proper care.

Common Mistakes with Chili Rasbora

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Keeping fewer than 10 together

Chili Rasbora is a schooling species — they need a group of at least 10 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Relying on a heater without a thermometer

Chili Rasbora needs 72–82°F. Heaters malfunction or drift over time — always use a separate thermometer to verify. Temperature swings of even 3–4°F can trigger stress and disease, particularly ich.

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Putting them in a tank under 5 gallons

While 5 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (10 gal) is much more forgiving.