Can Least Rasbora live with Dwarf Crayfish (CPO)?
Light caution
Why
- Dwarf Crayfish (CPO) can grab Least Rasbora while it sleeps — only fast mid/top-water fish are reasonably safe.
- Only a narrow pH overlap — keep both around 7–7.
- Only a narrow water hardness overlap — keep both around 6–8 dGH.
Sweet spot: both do well at 75–79°F and pH 7–7 — aim there.
Side-by-side
| Least Rasbora | Dwarf Crayfish (CPO) | |
|---|---|---|
| Temperature | 75–82°F | 65–79°F |
| pH | 5–7 | 7–8 |
| Hardness (GH) | 1–8 dGH | 6–15 dGH |
| Adult size | 0.8" | 1.75" |
| Temperament | Peaceful | Peaceful |
| Min tank | 10 gal | 10 gal |
Together, plan on at least 10 gallons.
How to make it work
- Only combine with fast, mid/top-water fish and give the tankmates plenty of escape routes.
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
Where to buy
- Dwarf Crayfish (CPO): 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 Least Rasbora, Dwarf Crayfish (CPO) →Everything compatible with Least Rasbora · …with Dwarf Crayfish (CPO)