Can Black Sail Cory live with Guppy?
Light caution
Why
- Only a narrow pH overlap — keep both around 6.8–7.
- Only a narrow water hardness overlap — keep both around 8–10 dGH.
Sweet spot: both do well at 75–82°F and pH 6.8–7 — aim there.
Side-by-side
| Black Sail Cory | Guppy | |
|---|---|---|
| Temperature | 75–82°F | 72–82°F |
| pH | 5.5–7 | 6.8–7.8 |
| Hardness (GH) | 2–10 dGH | 8–20 dGH |
| Adult size | 2" | 2" |
| Temperament | Peaceful | Peaceful |
| Min tank | 20 gal | 10 gal |
Together, plan on at least 20 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
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Design a tank with Black Sail Cory, Guppy →Everything compatible with Black Sail Cory · …with Guppy