Can Carnival / Polka Dot Freshwater Crab live with Thai Devil Crab?
Compatible
Why
No conflicts — these two share similar water needs, temperament, and size, and neither is a threat to the other.
Sweet spot: both do well at 75–82°F and pH 7.5–8 — aim there.
Side-by-side
| Carnival / Polka Dot Freshwater Crab | Thai Devil Crab | |
|---|---|---|
| Temperature | 75–82°F | 75–84°F |
| pH | 7.5–8 | 7.5–8.5 |
| Hardness (GH) | 8–15 dGH | 8–18 dGH |
| Adult size | 1.5" | 2" |
| Temperament | Peaceful | Semi-aggressive |
| Min tank | 10 gal | 20 gal |
Together, plan on at least 20 gallons.
Design the whole tank, not just the stocking
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Design a tank with Carnival / Polka Dot Freshwater Crab, Thai Devil Crab →Everything compatible with Carnival / Polka Dot Freshwater Crab · …with Thai Devil Crab
Related pairings
Carnival / Polka Dot Freshwater Crab + Neon TetraCarnival / Polka Dot Freshwater Crab + Cherry ShrimpCarnival / Polka Dot Freshwater Crab + AngelfishCarnival / Polka Dot Freshwater Crab + Nerite SnailCarnival / Polka Dot Freshwater Crab + Amano ShrimpCarnival / Polka Dot Freshwater Crab + Harlequin Rasbora