Can Thai Devil Crab live with Guppy?
Caution — with care
Why
- Thai Devil Crab can grab Guppy while it sleeps — only fast mid/top-water fish are reasonably safe.
- Only a narrow pH overlap — keep both around 7.5–7.8.
Sweet spot: both do well at 75–82°F and pH 7.5–7.8 — aim there.
Side-by-side
| Thai Devil Crab | Guppy | |
|---|---|---|
| Temperature | 75–84°F | 72–82°F |
| pH | 7.5–8.5 | 6.8–7.8 |
| Hardness (GH) | 8–18 dGH | 8–20 dGH |
| Adult size | 2" | 2" |
| Temperament | Semi-aggressive | Peaceful |
| Min tank | 20 gal | 10 gal |
Together, plan on at least 20 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.
Design the whole tank, not just the stocking
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Design a tank with Thai Devil Crab, Guppy →Everything compatible with Thai Devil Crab · …with Guppy