Can Harlequin Rasbora live with Red Swordtail? With caution
Large size gap — watch that Red Swordtail doesn't bully Harlequin Rasbora.
Side by side
| 🐟 Harlequin Rasbora | 🐠 Red Swordtail | |
| Adult size | 2" | 5.5" |
| Min tank | 15 gal | 20 gal |
| Temperature | 72–80°F | 72–82°F |
| pH | 6–7.5 | 7–8.4 |
| Temperament | Peaceful | Semi-aggressive |
How to make it work
- Large size gap — watch that Red Swordtail doesn't bully Harlequin Rasbora.
- Provide ample swimming space, sight breaks, and matched water parameters.