Dwarf Gourami and Koi Compatibility Overview
Dwarf Gourami and Koi are generally not recommended to be housed together. Koi is a cool-water fish and Dwarf Gourami is tropical, so the usable temperature range decides this pairing. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Dwarf Gourami | Koi | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 50โ75ยฐF | โ ๏ธ 72โ75ยฐF (narrow) |
| pH Range | 6.0โ7.5 | 7.0โ8.5 | โ ๏ธ 7.0โ7.5 (narrow) |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 3.5 in | 24 in | โ 7ร difference |
| Min. Group | 1+ | 2+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Dwarf Gourami โ Trichogaster lalius
Colourful labyrinth fish that is generally peaceful but can be territorial toward similar species. Susceptible to Dwarf Gourami Iridovirus.
โ Full Dwarf Gourami care guide
Koi โ 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 Dwarf Gourami live with Koi?
Generally not recommended. Dwarf Gourami and Koi are generally not recommended to be housed together. Koi is a cool-water fish and Dwarf Gourami is tropical, so the usable temperature range decides this pairing. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Dwarf Gourami and Koi together?
A minimum of 100 gallons is recommended for keeping Dwarf Gourami and Koi together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Dwarf Gourami and Koi?
72โ75ยฐF (narrow) โ inside Dwarf Gourami's 72โ82ยฐF and Koi's 50โ75ยฐF.
Is a Dwarf Gourami aggressive toward a Koi?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Dwarf Gourami and Koi
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 180 gal | Best when keeping larger schools or reducing territorial pressure. |