Can Black Neon Tetra live with Fiddler Crab?
Caution — with care
Why
- Fiddler Crab can grab Black Neon Tetra while it sleeps — only fast mid/top-water fish are reasonably safe.
- No overlapping water hardness: Black Neon Tetra wants 2–12 dGH but Fiddler Crab wants 15–25 dGH.
- Only a narrow pH overlap — keep both around 7.5–7.5.
Sweet spot: both do well at 72–82°F and pH 7.5–7.5 — aim there.
Side-by-side
| Black Neon Tetra | Fiddler Crab | |
|---|---|---|
| Temperature | 72–82°F | 72–82°F |
| pH | 5.5–7.5 | 7.5–8.5 |
| Hardness (GH) | 2–12 dGH | 15–25 dGH |
| Adult size | 1.5" | 2" |
| 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 Black Neon Tetra, Fiddler Crab →Everything compatible with Black Neon Tetra · …with Fiddler Crab