Royal Gramma and Sterbai Cory Compatibility Overview
Royal Gramma and Sterbai Cory are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Royal Gramma wants 8.1โ8.4 and Sterbai Cory wants 6.0โ7.6. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Royal Gramma | Sterbai Cory | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 8.1โ8.4 | 6.0โ7.6 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 3.0 in | 2.6 in | โ Similar |
| Min. Group | 1+ | 6+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Royal Gramma โ Gramma loreto
The Royal Gramma, known for its vibrant blue coloration, is a popular saltwater fish among beginners and experienced aquarists alike. It requires a well-maintained tank with plenty of swimming space and a moderate current. With a peaceful temperament and a relatively easy care routine, the Royal Gramma can be a great addition to a community tank.
โ Full Royal Gramma care guide
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 Royal Gramma live with Sterbai Cory?
Generally not recommended. Royal Gramma and Sterbai Cory are generally not recommended to be housed together. One of these is a marine species and the other is not; they cannot share one aquarium. Their pH ranges do not meet: Royal Gramma wants 8.1โ8.4 and Sterbai Cory wants 6.0โ7.6. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Royal Gramma and Sterbai Cory together?
A minimum of 20 gallons is recommended for keeping Royal Gramma and Sterbai Cory together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Royal Gramma and Sterbai Cory?
75โ82ยฐF โ inside Royal Gramma's 72โ82ยฐF and Sterbai Cory's 75โ82ยฐF.
Is a Royal Gramma aggressive toward a Sterbai Cory?
Royal Gramma is semi and Sterbai Cory is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Royal Gramma 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 | 30 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 75 gal | Best when keeping larger schools or reducing territorial pressure. |