Can Fiddler Crab live with Emerald Eye Rasbora?
Caution — with care
Why
- Fiddler Crab can grab Emerald Eye Rasbora while it sleeps — only fast mid/top-water fish are reasonably safe.
- No overlapping water hardness: Fiddler Crab wants 15–25 dGH but Emerald Eye Rasbora wants 4–10 dGH.
- Only a narrow pH overlap — keep both around 7.5–7.5.
Sweet spot: both do well at 72–79°F and pH 7.5–7.5 — aim there.
Side-by-side
| Fiddler Crab | Emerald Eye Rasbora | |
|---|---|---|
| Temperature | 72–82°F | 72–79°F |
| pH | 7.5–8.5 | 5.5–7.5 |
| Hardness (GH) | 15–25 dGH | 4–10 dGH |
| Adult size | 2" | 1.4" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 15 gal |
Together, plan on at least 15 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
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Design a tank with Fiddler Crab, Emerald Eye Rasbora →Everything compatible with Fiddler Crab · …with Emerald Eye Rasbora