What fish can live with Rosy Tetra?

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 Rosy Tetra against your own reading before you buy.

What tank mates should you avoid with Rosy Tetra?

Avoid Betta, Angelfish, Guppy based on size, temperament, or predation risk on file.

What size tank do Rosy Tetra need for a community?

80L is the planning floor for adult swimming space and bioload headroom. Long-term, a 100L+ 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.

Rosy Tetra tank mates

A pink mid-size schooler for soft-water planted tanks. Less nippy than silver tips, still not safe with bettas. Six or more for colour.

Evidence: partially verified

Confidence: medium

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

← Full Rosy Tetra profile·Compatibility checker·Tank builder·More tetra

Best tank mates (on file)

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

Cardinal Tetra Pair check
The Rosy Tetra profile lists Cardinal Tetra as both safe and a recommended pairing. Cardinal Tetra schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Corydoras Catfish Pair check
The Rosy Tetra profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish swims in the bottom zone while Rosy Tetra stays in the middle, so the two will not crowd the same water column.
Harlequin Rasbora Pair check
The Rosy Tetra profile lists Harlequin Rasbora as both safe and a recommended pairing. Harlequin Rasbora schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Otocinclus Pair check
The Rosy Tetra 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.

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.

Dwarf Gourami Open pair check
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.

Fish to avoid with Rosy Tetra

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

Betta See why (pair)
Betta conflicts with Rosy Tetra on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.
Angelfish See why (pair)
Angelfish reaches 20cm and is flagged predatory. Rosy Tetra at 4cm is prey-sized for it.
Guppy See why (pair)
Guppy conflicts with Rosy Tetra on temperament, predation, or footprint. The juvenile size in a shop tank is not the figure that matters here.

Tank size and groups

Published minimum for Rosy Tetra: 80L — group minimum 6 (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: 80L hub.

Plan before you buy

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

Open compatibility checker Tank builder

Filtration & heating

A 80L minimum tank for Rosy Tetra needs a filter rated for at least 320L/hr turnover and a heater maintaining 23–28°C.

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