Can Black Molly live with Julii Cory?
Light caution
Why
- Only a narrow water hardness overlap — keep both around 12–12 dGH.
Sweet spot: both do well at 72–79°F and pH 7–7.8 — aim there.
Side-by-side
| Black Molly | Julii Cory | |
|---|---|---|
| Temperature | 72–82°F | 72–79°F |
| pH | 7–8.5 | 6–7.8 |
| Hardness (GH) | 12–30 dGH | 2–12 dGH |
| Adult size | 4" | 2" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 20 gal |
Together, plan on at least 30 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: GH remineraliser
Where to buy
- Julii Cory: 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
Skapelab plans a complete, buildable planted aquarium around your fish — a hand-illustrated layout, the exact plants and hardscape, a placement map, and a full equipment and shopping list. Free.
Design a tank with Black Molly, Julii Cory →Everything compatible with Black Molly · …with Julii Cory