Guppy and Harlequin Rasbora Compatibility Overview
Guppy and Harlequin Rasbora can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Guppy | Harlequin Rasbora | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ81ยฐF | โ 72โ81ยฐF |
| pH Range | 6.8โ8.5 | 5.5โ7.5 | โ ๏ธ 6.8โ7.5 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 2.5 in | 1.75 in | โ Similar |
| Min. Group | 3+ | 8+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
Species Profiles
Guppy โ Poecilia reticulata
Hardy and colourful livebearers. Males' long flowing tails make them targets for fin-nipping species. Very prolific breeders.
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.
Frequently Asked Questions
Can Guppy live with Harlequin Rasbora?
Yes, in a well-planned setup. Guppy and Harlequin Rasbora can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Guppy and Harlequin Rasbora together?
A minimum of 20 gallons is recommended for keeping Guppy and Harlequin Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Guppy and Harlequin Rasbora?
72โ81ยฐF โ inside Guppy's 72โ82ยฐF and Harlequin Rasbora's 72โ81ยฐF.
Is a Guppy aggressive toward a Harlequin Rasbora?
Guppy is peaceful and Harlequin Rasbora is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Guppy and Harlequin Rasbora
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |