Skip to main content
Compatibility

Compatibility brief

Can Ember Tetra live with Harlequin Rasbora?

Ember Tetra

Ember Tetra

Hyphessobrycon amandae

peaceful~2cm
Harlequin Rasbora

Harlequin Rasbora

Trigonostigma heteromorpha

peaceful~5cm
VerdictGOOD

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

In many setups, Ember Tetra and Harlequin Rasbora 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

60L

Combined minimum footprint reference for these two species: about 60L (larger active fish often want more length).

Temperature
Range in °C22–27°C shared
Ember TetraHarlequin RasboraShared window
pH
Range6–7 shared
Ember TetraHarlequin RasboraShared window
Temperament / behaviour

Both are peaceful midwater schoolers with overlapping soft-water preferences and a similar temperature band. They usually ignore each other’s fins and share the calm middle lane without a territory fight. The pairing works when both groups are stocked as real schools rather than token pairs. Ember tetras need more numbers than many keepers expect, and harlequins still look washed out below six. A tank that is too small or too bare can make either school nervous even though temperament fits.

Assessment details

  1. Compatible temperaments

    Both Ember Tetra and Harlequin Rasbora share a peaceful temperament.

  2. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

Next steps

Concrete changes, not "research more" filler.

  • •Keep at least eight ember tetras and six or more harlequins in a planted tank with stable soft water, and avoid boisterous fin-nippers that will stress both schools.
  • •Ember Tetra should be kept in a group of at least 8 for best health and behaviour.
  • •Harlequin Rasbora should be kept in a group of at least 6 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 Ember Tetra + Harlequin Rasbora

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 Ember Tetra

Ember Tetra + Harlequin Rasbora — common questions

Can Ember Tetra live with Harlequin Rasbora?
Usually yes. Fishori’s verdict is GOOD because both are peaceful midwater species with similar temperature needs. Stock proper school sizes for each species or the pairing looks fine on paper and fails in practice.
What tank size do you need for Ember Tetra and Harlequin Rasbora together?
Plan around 60 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?
Ember Tetra should be kept in a group of at least 8 for best health and behaviour. Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.