Can Fiddler Crab live with Flash Pleco (L204)?
Not recommended
Why
- Fiddler Crab hunts along the bottom and will catch the bottom-dwelling Flash Pleco (L204), especially at night.
- No overlapping water hardness: Fiddler Crab wants 15–25 dGH but Flash Pleco (L204) wants 6–7.5 dGH.
- Only a narrow pH overlap — keep both around 7.5–7.6.
Side-by-side
| Fiddler Crab | Flash Pleco (L204) | |
|---|---|---|
| Temperature | 72–82°F | 72–82°F |
| pH | 7.5–8.5 | 6.5–7.6 |
| Hardness (GH) | 15–25 dGH | 6–7.5 dGH |
| Adult size | 2" | 20" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 125 gal |
Together, plan on at least 125 gallons.
Compatible alternatives
Instead of Fiddler Crab (to keep Flash Pleco (L204)):
- Pom Pom Crab — 1", semi-aggressive
- Thai Micro Pom Pom Crab — 0.8", peaceful
- Thai Micro Crab — 0.4", peaceful
Instead of Flash Pleco (L204) (to keep Fiddler Crab):
- Giant Gourami — 24", semi-aggressive
- Oscar — 16", aggressive
- Kissing Gourami — 12", semi-aggressive
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Design a tank with Fiddler Crab, Flash Pleco (L204) →Everything compatible with Fiddler Crab · …with Flash Pleco (L204)