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Compatibility

Compatibility brief

Can Cardinal Tetra live with Rummy Nose Tetra?

Cardinal Tetra

Cardinal Tetra

Paracheirodon axelrodi

peaceful~5cm
Rummy Nose Tetra

Rummy Nose Tetra

Hemigrammus rhodostomus

peaceful~5cm
VerdictGOOD

Often a workable match in a suitable, well-run tank. Still verify behaviour in your setup.

In many setups, Cardinal Tetra and Rummy Nose Tetra are often kept together in a suitable peaceful community when temperature and pH are matched and the tank is sized for adults. Individual behaviour, filtration, and layout still decide whether it works in your home.

Compatibility score

100/100

Profile confidence: high

Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.

Min tank

80L

Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).

Temperature
Range in °C24–27°C shared
Cardinal TetraRummy Nose TetraShared window
pH
Range5.5–7 shared
Cardinal TetraRummy Nose TetraShared window

Assessment details

  1. Compatible temperaments

    Both Cardinal Tetra and Rummy Nose Tetra share a peaceful temperament.

  2. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

Next steps

Concrete changes, not "research more" filler.

  • •Cardinal Tetra should be kept in a group of at least 6 for best health and behaviour.
  • •Rummy Nose Tetra should be kept in a group of at least 8 for best health and behaviour.
Sources from both profiles
Only URLs that exist on the species records are shown. We do not fabricate citations.

Try this next

Build the full stocking list with Cardinal Tetra + Rummy Nose Tetra

Compare another pairOpen tank builder

Plan further

Check each species’ mates list, size the glass, then verify the full stock in the builder. Methodology explains how verdicts are produced.

Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.

Profile data confidence: high. Checked against several solid care sources that mostly agree.

Full tank-mate guides

Related pair checks

Other tank mates for Cardinal Tetra

Cardinal Tetra + Rummy Nose Tetra — common questions

Can Cardinal Tetra live with Rummy Nose Tetra?
Usually, yes. The pairing resolves GOOD in Fishori's checks for a tank of about 80 litres or more with the shared water windows shown on this page. Individual fish still vary, so watch the first weeks closely.
What tank size do you need for Cardinal Tetra and Rummy Nose Tetra together?
Plan around 80 litres as the working minimum. That figure comes from each species' published minimum and their group needs, and it assumes adult sizes, not shop sizes.
What should you check before buying?
Cardinal Tetra should be kept in a group of at least 6 for best health and behaviour. Rummy Nose Tetra should be kept in a group of at least 8 for best health and behaviour.