Harlequin Rasbora and Three Spot Gourami Compatibility Overview
Harlequin Rasbora and Three Spot Gourami can potentially coexist, but the combination requires careful attention. Harlequin Rasbora is peaceful and Three Spot Gourami is semi, so give them room and cover rather than assuming they will ignore each other. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
| Factor | Harlequin Rasbora | Three Spot Gourami | Verdict |
|---|---|---|---|
| Temperature | 72โ81ยฐF | 75โ86ยฐF | โ 75โ81ยฐF |
| pH Range | 5.5โ7.5 | 5.5โ8.5 | โ 5.5โ7.5 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.75 in | 5.9 in | โ ๏ธ 3.4ร difference |
| Min. Group | 8+ | 1+ | See below |
| Min. Tank Size | 75 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Harlequin Rasbora โ Trigonostigma heteromorpha
Active mid-level schooling fish with a distinctive black triangular patch. One of the best all-around community tank fish.
โ Full Harlequin Rasbora care guide
Three Spot Gourami โ Trichopodus trichopterus
The Three Spot Gourami is a peaceful and attractive addition to freshwater tanks. They are known for their vibrant coloration and peaceful demeanor. With their flowing tails and distinctive body spots, they add visual interest to the aquarium. Providing a well-planted tank with hiding spots is crucial for their well-being.
Frequently Asked Questions
Can Harlequin Rasbora live with Three Spot Gourami?
With significant caution and a larger tank. Harlequin Rasbora and Three Spot Gourami can potentially coexist, but the combination requires careful attention. Harlequin Rasbora is peaceful and Three Spot Gourami is semi, so give them room and cover rather than assuming they will ignore each other. A larger tank (minimum 75 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Harlequin Rasbora and Three Spot Gourami together?
A minimum of 75 gallons is recommended for keeping Harlequin Rasbora and Three Spot Gourami together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Harlequin Rasbora and Three Spot Gourami?
75โ81ยฐF โ inside Harlequin Rasbora's 72โ81ยฐF and Three Spot Gourami's 75โ86ยฐF.
Is a Harlequin Rasbora aggressive toward a Three Spot Gourami?
Harlequin Rasbora is peaceful and Three Spot Gourami is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Harlequin Rasbora and Three Spot Gourami
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |