Jewel Cichlid and Koi Compatibility Overview
Jewel Cichlid and Koi are generally not recommended to be housed together. Koi is a cool-water fish and Jewel Cichlid 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 | Jewel Cichlid | Koi | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 50โ75ยฐF | โ ๏ธ 72โ75ยฐF (narrow) |
| pH Range | 6.0โ7.8 | 7.0โ8.5 | โ ๏ธ 7.0โ7.8 (narrow) |
| Temperament | aggressive | peaceful | โ Risk |
| Adult Size | 5.9 in | 24 in | โ 4ร difference |
| Min. Group | 2+ | 2+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Jewel Cichlid โ Hemichromis bimaculatus
The Jewel Cichlid, Hemichromis bimaculatus, is a vibrant and territorial fish popular in the aquarium trade. They require a spacious tank with hiding spots and can be moderately aggressive. With proper care, they can be a rewarding addition to the home aquarium.
โ Full Jewel Cichlid 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 Jewel Cichlid live with Koi?
Generally not recommended. Jewel Cichlid and Koi are generally not recommended to be housed together. Koi is a cool-water fish and Jewel Cichlid 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 Jewel Cichlid and Koi together?
A minimum of 100 gallons is recommended for keeping Jewel Cichlid and Koi together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Jewel Cichlid and Koi?
72โ75ยฐF (narrow) โ inside Jewel Cichlid's 72โ82ยฐF and Koi's 50โ75ยฐF.
Is a Jewel Cichlid aggressive toward a Koi?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Jewel Cichlid 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. |