Royal Gramma and Silver Arowana Compatibility Overview
Royal Gramma and Silver Arowana 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. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Royal Gramma | Silver Arowana | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 68โ86ยฐF | โ 72โ82ยฐF |
| pH Range | 8.1โ8.4 | 5.0โ7.5 | โ No overlap |
| Temperament | semi | aggressive | โ Risk |
| Adult Size | 3.0 in | 31.5 in | โ 10ร difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 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
Silver Arowana โ Osteoglossum bicirrhosum
The Silver Arowana is a majestic and unique fish known for its striking appearance and size. It is a large, predatory fish that requires a spacious tank and specific water conditions. While not a community fish, it can be kept with compatible, larger species. They are sensitive to stress and require careful water quality management.
Frequently Asked Questions
Can Royal Gramma live with Silver Arowana?
Generally not recommended. Royal Gramma and Silver Arowana 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. 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 Royal Gramma and Silver Arowana together?
A minimum of 100 gallons is recommended for keeping Royal Gramma and Silver Arowana together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Royal Gramma and Silver Arowana?
72โ82ยฐF โ inside Royal Gramma's 72โ82ยฐF and Silver Arowana's 68โ86ยฐF.
Is a Royal Gramma aggressive toward a Silver Arowana?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Royal Gramma and Silver Arowana
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 250 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 350 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 450 gal | Best when keeping larger schools or reducing territorial pressure. |