Can Koi Angelfish live with Black Molly?
Caution — with care
Why
- Only a narrow water hardness overlap — keep both around 12 dGH.
Sweet spot: both do well at 78–82°F and pH 7–7.5 — aim there.
Side-by-side
| Koi Angelfish | Black Molly | |
|---|---|---|
| Temperature | 78–84°F | 72–82°F |
| pH | 6–7.5 | 7–8.5 |
| Hardness (GH) | 3–12 dGH | 12–30 dGH |
| Adult size | 6" | 4" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 30 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 → Aquarium Co-Op
Where to buy
- Koi Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Black Molly: buy at Flip Aquatics · Flip Aquatics 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.
Build a full tank around this stocking →Everything compatible with Koi Angelfish · …with Black Molly