Can Koi Angelfish live with Green Neon Tetra?
Not recommended
Why
- Koi Angelfish’s mouth is big enough to swallow Green Neon Tetra (only 1" long) — it will be eaten.
- Only a narrow water hardness overlap — keep both around 3–5 dGH.
Side-by-side
| Koi Angelfish | Green Neon Tetra | |
|---|---|---|
| Temperature | 78–84°F | 75–84°F |
| pH | 6–7.5 | 4–6.5 |
| Hardness (GH) | 3–12 dGH | 1–5 dGH |
| Adult size | 6" | 1" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 10 gal |
Together, plan on at least 30 gallons.
Compatible alternatives
Instead of Koi Angelfish (to keep Green Neon Tetra):
- Croaking Gourami — 3", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Cardinal Tetra — 2", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Cherry Barb — 2", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
Instead of Green Neon Tetra (to keep Koi Angelfish):
- Black Neon Tetra — 1.5", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Lambchop Rasbora — 1.25", peaceful buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Neon Tetra — 1.5", peaceful buy at Aquarium Co-Op
Where to buy
- Koi Angelfish: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Green Neon Tetra: 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 Green Neon Tetra