Can Fiddler Crab live with Red Devil Vampire Crab?
Light caution
Why
- Only a narrow water hardness overlap — keep both around 15–15 dGH.
Sweet spot: both do well at 75–82°F and pH 7.5–8 — aim there.
Side-by-side
| Fiddler Crab | Red Devil Vampire Crab | |
|---|---|---|
| Temperature | 72–82°F | 75–82°F |
| pH | 7.5–8.5 | 7.5–8 |
| Hardness (GH) | 15–25 dGH | 8–15 dGH |
| Adult size | 2" | 1.5" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 10 gal |
Together, plan on at least 15 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
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Design a tank with Fiddler Crab, Red Devil Vampire Crab →Everything compatible with Fiddler Crab · …with Red Devil Vampire Crab