What fish can live with Chili Rasbora?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Chili Rasbora against your own reading before you buy.

What tank mates should you avoid with Chili Rasbora?

Avoid Betta, Tiger Barb, Angelfish, Oscar based on size, temperament, or predation risk on file.

What size tank do Chili Rasbora need for a community?

20L is the planning floor for adult swimming space and bioload headroom. Long-term, a 24L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Chili Rasbora tank mates

A 2 cm nano fish that shows full red colouring only in soft blackwater with tannins. Hard, bright, busy tanks wash the colour out completely.

Evidence: partially verified

Confidence: high

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Chili Rasbora profile·Compatibility checker·Tank builder·More barb

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Celestial Pearl Danio Pair check
The Chili Rasbora profile lists Celestial Pearl Danio as both safe and a recommended pairing. Celestial Pearl Danio schools in groups of 8 or more, so plan room for the whole group rather than one fish.
Otocinclus Pair check
The Chili Rasbora profile lists Otocinclus as both safe and a recommended pairing. Otocinclus schools in groups of 4 or more, so plan room for the whole group rather than one fish. Otocinclus grows bigger than Chili Rasbora (5cm vs 2cm). Stock the Chili Rasbora group large enough to outnumber the Otocinclus, or the smaller fish ends up bullied or off food.
Pygmy Corydoras Pair check
The Chili Rasbora profile lists Pygmy Corydoras as both safe and a recommended pairing. Pygmy Corydoras schools in groups of 6 or more, so plan room for the whole group rather than one fish.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

None on file beyond the safe list.

Fish to avoid with Chili Rasbora

From the unsafe list — predation, aggression, or space rules on this profile.

Betta See why (pair)
Betta conflicts with Chili Rasbora on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Tiger Barb See why (pair)
Tiger Barb needs at least 80L, far above the 20L minimum for Chili Rasbora. The tank that houses one stresses the other.
Angelfish See why (pair)
Angelfish reaches 20cm and is flagged predatory. Chili Rasbora at 2cm is prey-sized for it. Angelfish needs at least 150L, far above the 20L minimum for Chili Rasbora. The tank that houses one stresses the other.
Oscar See why (pair)
Oscar reaches 35cm and is flagged predatory. Chili Rasbora at 2cm is prey-sized for it. Oscar needs at least 300L, far above the 20L minimum for Chili Rasbora. The tank that houses one stresses the other. Oscar is rated aggressive and Chili Rasbora is rated peaceful. No community-style planning carries that gap.

Tank size and groups

Published minimum for Chili Rasbora: 20L — group minimum 8 (schooling).
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 30L hub.

Easier alternatives to consider

Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 20L minimum tank for Chili Rasbora needs a filter rated for at least 80L/hr turnover and a heater maintaining 24–28°C.

Filter buying guide →Heater buying guide →Beginner plants guide →

Related (care + temperament)

Other species that list Chili Rasbora

Reverse lookup: these profiles reference Chili Rasbora under safe or “best with” lists.