Can Harlequin Rasbora Live With Silver Arowana?
Harlequin Rasbora and Silver Arowana are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 75–82°F.
pH
✓ Compatible
Good pH overlap at 6.0–7.0.
Size
✗ Not Compatible
Extreme size difference. Silver Arowana (36") may eat or bully Harlequin Rasbora (2").
Temperament
⚠ Use Caution
Harlequin Rasbora (peaceful) may have issues with Silver Arowana (semi-aggressive). Monitor closely if attempting.
Swim Level
✓ Compatible
Fish occupy different water levels (Harlequin Rasbora: middle, Silver Arowana: top), reducing conflict.
Trait Conflict
✗ Not Compatible
Silver Arowana is a predator and may eat Harlequin Rasbora.
Important Notes
- Harlequin Rasbora is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 250 gallons
| Parameter | Harlequin Rasbora | Silver Arowana |
|---|---|---|
| Temperature | 72–82°F | 75–82°F |
| pH | 6–7.5 | 6–7 |
| Max Size | 2" | 36" |
| Temperament | Peaceful | Semi-aggressive |
| Swim Level | Middle | Top |
| Min Tank | 10 gal | 250 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.