Compatibility Overview
Honey Gourami and Koi are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Honey Gourami | Koi | Verdict |
|---|---|---|---|
| Temperature | 71–82°F | 50–75°F | ✅ 71–75°F |
| pH Range | 6.0–7.5 | 7.0–8.5 | ⚠️ 7.0–7.5 (narrow) |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 2 in | 24 in | ❌ 12× difference |
| Min. Group | 1+ | 2+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Honey Gourami — Trichogaster chuna
One of the most peaceful gouramis available. Not affected by Dwarf Gourami Iridovirus. Excellent nano community fish.
→ Full Honey Gourami care guide
Koi — Cyprinus rubrofuscus
Large pond fish that require hundreds of gallons and cool water. Will eat any fish small enough to fit in their mouth.
Frequently Asked Questions
Can Honey Gourami live with Koi?
Generally not recommended. Honey Gourami and Koi are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Honey Gourami and Koi together?
A minimum of 100 gallons is recommended for keeping Honey Gourami and Koi together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Honey Gourami and Koi?
71–75°F
Is a Honey Gourami aggressive toward a Koi?
Honey Gourami is peaceful and Koi is peaceful. Honey Gourami requires tropical water; Koi requires cold water. These environments are incompatible.