Can Carnival / Polka Dot Freshwater Crab live with Swordtail?
Caution — with care
Why
- Carnival / Polka Dot Freshwater Crab can grab Swordtail while it sleeps — only fast mid/top-water fish are reasonably safe.
Sweet spot: both do well at 75–82°F and pH 7.5–8 — aim there.
Side-by-side
| Carnival / Polka Dot Freshwater Crab | Swordtail | |
|---|---|---|
| Temperature | 75–82°F | 72–82°F |
| pH | 7.5–8 | 7–8.4 |
| Hardness (GH) | 8–15 dGH | 12–30 dGH |
| Adult size | 1.5" | 5.5" |
| Temperament | Peaceful | Semi-aggressive |
| Min tank | 10 gal | 29 gal |
Together, plan on at least 29 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
Design the whole tank, not just the stocking
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Design a tank with Carnival / Polka Dot Freshwater Crab, Swordtail →Everything compatible with Carnival / Polka Dot Freshwater Crab · …with Swordtail
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