Can Fiddler Crab live with Moonlight Gourami?
Caution — with care
Why
- Fiddler Crab can grab Moonlight Gourami while it sleeps — only fast mid/top-water fish are reasonably safe.
- No overlapping water hardness: Fiddler Crab wants 15–25 dGH but Moonlight Gourami wants 6–7.5 dGH.
- Only a narrow pH overlap — keep both around 7.5–7.6.
Sweet spot: both do well at 77–82°F and pH 7.5–7.6 — aim there.
Side-by-side
| Fiddler Crab | Moonlight Gourami | |
|---|---|---|
| Temperature | 72–82°F | 77–86°F |
| pH | 7.5–8.5 | 6.5–7.6 |
| Hardness (GH) | 15–25 dGH | 6–7.5 dGH |
| Adult size | 2" | 6" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 55 gal |
Together, plan on at least 55 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, Moonlight Gourami →Everything compatible with Fiddler Crab · …with Moonlight Gourami