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Compatibility

Compatibility brief

Can Dwarf Gourami live with Harlequin Rasbora?

Dwarf Gourami

Dwarf Gourami

Trichogaster lalius

peaceful~8cm
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, Dwarf Gourami 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 °C24–27°C shared
Dwarf GouramiHarlequin RasboraShared window
pH
Range6–7.5 shared
Dwarf GouramiHarlequin RasboraShared window
Temperament / behaviour

Harlequin rasboras stay in a peaceful midwater school while dwarf gouramis work the upper column, so the usual friction is space rather than aggression. Water overlap is workable in a soft planted community. The pairing is not automatic: some male gouramis still chase when they claim a sight line, and commercially bred dwarf gouramis carry real disease risk that quarantine should address before they join a rasbora school. That health limit does not change the temperament verdict, but it is part of responsible stocking.

Assessment details

  1. Compatible temperaments

    Both Dwarf Gourami 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.

  • •Quarantine new dwarf gouramis, add one male or a calm pair to a planted tank with six or more harlequins, and split the stock if persistent chasing starts.
  • •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 Dwarf Gourami + 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 Dwarf Gourami

Dwarf Gourami + Harlequin Rasbora — common questions

Can Dwarf Gourami live with Harlequin Rasbora?
Usually yes. Fishori’s verdict is GOOD for a soft-water community with midwater rasboras and a top-dwelling gourami. Quarantine dwarf gouramis first; disease risk in shop stock is a practical limit even when temperament fits.
What tank size do you need for Dwarf Gourami 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?
Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.