Royal Gramma and X Ray Tetra Compatibility Overview
Royal Gramma and X Ray Tetra 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 X Ray Tetra wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Royal Gramma | X Ray Tetra | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 72โ82ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 6.0โ7.5 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 3.0 in | 1.8 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
X Ray Tetra โ Pristella maxillaris
The Pristella maxillaris, also known as the X-Ray Tetra, is a popular freshwater fish known for its unique appearance and peaceful nature. They are slender and iridescent, with a clear, almost x-ray-like body. They are best kept in groups of 6 or more and thrive in well-planted tanks with a moderate water flow.
Frequently Asked Questions
Can Royal Gramma live with X Ray Tetra?
Generally not recommended. Royal Gramma and X Ray Tetra 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 X Ray Tetra wants 6.0โ7.5. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Royal Gramma and X Ray Tetra together?
A minimum of 20 gallons is recommended for keeping Royal Gramma and X Ray Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Royal Gramma and X Ray Tetra?
72โ82ยฐF โ inside Royal Gramma's 72โ82ยฐF and X Ray Tetra's 72โ82ยฐF.
Is a Royal Gramma aggressive toward a X Ray Tetra?
Royal Gramma is semi and X Ray Tetra is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Royal Gramma and X Ray Tetra
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. |