Clown Loach and Harlequin Rasbora Compatibility Overview
Clown Loach and Harlequin Rasbora are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Clown Loach | Harlequin Rasbora | Verdict |
|---|---|---|---|
| Temperature | 77โ86ยฐF | 72โ81ยฐF | โ 77โ81ยฐF |
| pH Range | 6.0โ7.5 | 5.5โ7.5 | โ 6.0โ7.5 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 12 in | 1.75 in | โ 7ร difference |
| Min. Group | 5+ | 8+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Clown Loach โ Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
โ Full Clown Loach care guide
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 Clown Loach live with Harlequin Rasbora?
Generally not recommended. Clown Loach and Harlequin Rasbora are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Clown Loach and Harlequin Rasbora together?
A minimum of 100 gallons is recommended for keeping Clown Loach and Harlequin Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Loach and Harlequin Rasbora?
77โ81ยฐF โ inside Clown Loach's 77โ86ยฐF and Harlequin Rasbora's 72โ81ยฐF.
Is a Clown Loach aggressive toward a Harlequin Rasbora?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Loach 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 | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |