Koi and Sterbai Cory Compatibility Overview
Koi and Sterbai Cory are generally not recommended to be housed together. Koi is a cool-water fish and Sterbai Cory 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 | Koi | Sterbai Cory | Verdict |
|---|---|---|---|
| Temperature | 50โ75ยฐF | 75โ82ยฐF | โ ๏ธ 75โ75ยฐF (narrow) |
| pH Range | 7.0โ8.5 | 6.0โ7.6 | โ ๏ธ 7.0โ7.6 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 24 in | 2.6 in | โ 9ร difference |
| Min. Group | 2+ | 6+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
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.
Sterbai Cory โ Corydoras sterbai
The Sterbai Cory, known for its dark brown coloration with silver spots, is a popular bottom-dwelling fish. With a peaceful temperament, it is well-suited for community tanks. It requires a well-planted tank with plenty of hiding spots and moderate water flow. Regular water changes and a balanced diet are essential for their health.
Frequently Asked Questions
Can Koi live with Sterbai Cory?
Generally not recommended. Koi and Sterbai Cory are generally not recommended to be housed together. Koi is a cool-water fish and Sterbai Cory 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 Koi and Sterbai Cory together?
A minimum of 100 gallons is recommended for keeping Koi and Sterbai Cory together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Koi and Sterbai Cory?
75โ75ยฐF (narrow) โ inside Koi's 50โ75ยฐF and Sterbai Cory's 75โ82ยฐF.
Is a Koi aggressive toward a Sterbai Cory?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Koi and Sterbai Cory
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 | 220 gal | Best when keeping larger schools or reducing territorial pressure. |