Can Koi Angelfish live with Chocolate Gourami?
Light caution
Why
- Koi Angelfish is large enough to threaten a small Chocolate Gourami — usually fine once both are adult, but watch new additions.
- Only a narrow water hardness overlap — keep both around 3–5 dGH.
Sweet spot: both do well at 78–84°F and pH 6–6.5 — aim there.
Side-by-side
| Koi Angelfish | Chocolate Gourami | |
|---|---|---|
| Temperature | 78–84°F | 78–86°F |
| pH | 6–7.5 | 4–6.5 |
| Hardness (GH) | 3–12 dGH | 0–5 dGH |
| Adult size | 6" | 2" |
| Temperament | Peaceful | Peaceful |
| Min tank | 30 gal | 15 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
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Design a tank with Koi Angelfish, Chocolate Gourami →Everything compatible with Koi Angelfish · …with Chocolate Gourami