Can Marble Hatchetfish live with Molly? With caution
Preferred water chemistry differs — manageable but not ideal.
Side by side
| 🐟 Marble Hatchetfish | 🐠 Molly | |
| Adult size | 1.4" | 4.5" |
| Min tank | 15 gal | 20 gal |
| Temperature | 75–82°F | 72–82°F |
| pH | 5.5–7 | 7.5–8.5 |
| Temperament | Peaceful | Peaceful |
Why
- Preferred water chemistry differs — manageable but not ideal.
- Large size gap — watch that Molly doesn't bully Marble Hatchetfish.
How to make it work
- Preferred water chemistry differs — manageable but not ideal.
- Large size gap — watch that Molly doesn't bully Marble Hatchetfish.
- Provide ample swimming space, sight breaks, and matched water parameters.