Can Carnival / Polka Dot Freshwater Crab live with Black Rose Shrimp?
Caution — with care
Why
- Carnival / Polka Dot Freshwater Crab is not on the verified shrimp-safe list, so we will not recommend it over a breeding Black Rose Shrimp colony. It may well be fine — it simply has not been confirmed by a source, and an unverified guess is not worth the colony.
- Almost no shared temperature: Carnival / Polka Dot Freshwater Crab wants 75–82°F and Black Rose Shrimp wants 65–75°F, so only 75°F suits both — too fine a margin to actually hold.
- Carnival / Polka Dot Freshwater Crab hunts shrimp, though Black Rose Shrimp is nearly its own size — losses should be rare with cover.
- Carnival / Polka Dot Freshwater Crab will eat Black Rose Shrimp shrimplets. The colony still grows if there is moss or another dense hiding place for the babies.
- Only a narrow pH overlap — keep both around 7.5–7.8.
Sweet spot: both do well at 75–75°F and pH 7.5–7.8 — aim there.
Side-by-side
| Carnival / Polka Dot Freshwater Crab | Black Rose Shrimp | |
|---|---|---|
| Temperature | 75–82°F | 65–75°F |
| pH | 7.5–8 | 6.5–7.8 |
| Hardness (GH) | 8–15 dGH | 6–15 dGH |
| Adult size | 1.5" | 1.5" |
| Temperament | Peaceful | Peaceful |
| Min tank | 10 gal | 10 gal |
Together, plan on at least 10 gallons.
How to make it work
- Keep a large, established shrimp colony in a heavily planted tank with moss and cover so enough survive to breed.
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: An adjustable heater · GH remineraliser
Where to buy
- Black Rose Shrimp: buy at The Shrimp Farm · The Shrimp Farm live-arrival guarantee
Live-animal shipping: add a heat pack below 50°F, expect weather holds above 90°F, and schedule delivery for a moderate week when someone can receive it promptly.
Design the whole tank, not just the stocking
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Design a tank with Carnival / Polka Dot Freshwater Crab, Black Rose Shrimp →Everything compatible with Carnival / Polka Dot Freshwater Crab · …with Black Rose Shrimp
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