Compatibility brief
Can Harlequin Rasbora live with Kuhli Loach?
Often a workable match in a suitable, well-run tank. Still verify behaviour in your setup.
Compatibility score
Profile confidence: medium
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
70L
Combined minimum footprint reference for these two species: about 70L (larger active fish often want more length).
Assessment details
Compatible temperaments
Both Harlequin Rasbora and Kuhli Loach share a peaceful temperament.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
Next steps
Concrete changes, not "research more" filler.
- •Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
- •Kuhli Loach should be kept in a group of at least 5 for best health and behaviour.
- Seriously Fish. Trigonostigma heteromorpha
Supports: aquarium size, water chemistry, temperament and compatibility (primary care reference).
- FishBase. Trigonostigma heteromorpha
Supports: taxonomy and wild maximum size — translate to tank stocking, not a target number.
- Wikipedia. Trigonostigma heteromorpha
Supports: general species background and common-name orientation only.
- Loaches Online. Pangio kuhlii (coolie / kuhli loach)
Primary: loach-specific care and behaviour notes, including grouping; legacy spelling/URLs vary (kuhli vs kuhlii) because taxonomy in older texts is inconsistent.
- FishBase. Pangio kuhlii
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
Try this next
Build the full stocking list with Harlequin Rasbora + Kuhli Loach
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: medium. Driven by the lower-confidence profile (Kuhli Loach): Typical care sources — real tanks still vary.