Can Koi Angelfish live with Wild Betta Splendens?
Not recommended
Why
- Wild Betta Splendens is aggressive and will attack the peaceful Koi Angelfish.
- Only a narrow water hardness overlap — keep both around 6–7.5 dGH.
Side-by-side
| Koi Angelfish | Wild Betta Splendens | |
|---|---|---|
| Temperature | 78–84°F | 75–86°F |
| pH | 6–7.5 | 6.5–7.6 |
| Hardness (GH) | 3–12 dGH | 6–7.5 dGH |
| Adult size | 6" | 2.5" |
| Temperament | Peaceful | Aggressive |
| Min tank | 30 gal | 10 gal |
Together, plan on at least 30 gallons.
Compatible alternatives
Instead of Koi Angelfish (to keep Wild Betta Splendens):
- Blue Gourami — 6", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Gold Gourami — 6", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Opaline Gourami — 6", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Instead of Wild Betta Splendens (to keep Koi Angelfish):
- Betta (Siamese Fighting Fish) — 2.5", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Platy — 2.5", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Wild-Type Betta — 2.5", semi-aggressive buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Where to buy
- Koi Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Wild Betta Splendens: 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 Wild Betta Splendens