Can Fiddler Crab live with Blue Phantom Pleco?
Not recommended
Why
- Fiddler Crab hunts along the bottom and will catch the bottom-dwelling Blue Phantom Pleco, especially at night.
- No overlapping water hardness: Fiddler Crab wants 15–25 dGH but Blue Phantom Pleco wants 5.5–7 dGH.
- Only a narrow pH overlap — keep both around 7.5–7.6.
Side-by-side
| Fiddler Crab | Blue Phantom Pleco | |
|---|---|---|
| Temperature | 72–82°F | 75–82°F |
| pH | 7.5–8.5 | 6.5–7.6 |
| Hardness (GH) | 15–25 dGH | 5.5–7 dGH |
| Adult size | 2" | 7" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 55 gal |
Together, plan on at least 55 gallons.
Compatible alternatives
Instead of Fiddler Crab (to keep Blue Phantom Pleco):
- Pom Pom Crab — 1", semi-aggressive
- Thai Micro Pom Pom Crab — 0.8", peaceful
- Thai Micro Crab — 0.4", peaceful
Instead of Blue Phantom Pleco (to keep Fiddler Crab):
- Altum Angelfish — 7", peaceful
- Angelfish — 6", peaceful
- Gold Gourami — 6", semi-aggressive
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Design a tank with Fiddler Crab, Blue Phantom Pleco →Everything compatible with Fiddler Crab · …with Blue Phantom Pleco