Can Koi Angelfish live with Harlequin Rasbora?
Light caution
Why
- Koi Angelfish is large enough to threaten a small Harlequin Rasbora — usually fine once both are adult, but watch new additions.
Sweet spot: both do well at 78–80°F and pH 6–7.5 — aim there.
Side-by-side
| Koi Angelfish | Harlequin Rasbora | |
|---|---|---|
| Temperature | 78–84°F | 72–80°F |
| pH | 6–7.5 | 6–7.5 |
| Hardness (GH) | 3–12 dGH | 2–12 dGH |
| Adult size | 6" | 1.75" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 15 gal |
Together, plan on at least 30 gallons.
Where to buy
- Koi Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Harlequin Rasbora: 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 Harlequin Rasbora