Royal Gramma and Silver Dollar Compatibility Overview
Royal Gramma and Silver Dollar 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 Silver Dollar wants 6.0โ7.0. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Royal Gramma | Silver Dollar | Verdict |
|---|---|---|---|
| Temperature | 72โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 8.1โ8.4 | 6.0โ7.0 | โ No overlap |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 3.0 in | 5.9 in | โ Similar |
| Min. Group | 1+ | 5+ | See below |
| Min. Tank Size | 75 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 Dollar โ Metynnis argenteus
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school.
Frequently Asked Questions
Can Royal Gramma live with Silver Dollar?
Generally not recommended. Royal Gramma and Silver Dollar 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 Silver Dollar wants 6.0โ7.0. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Royal Gramma and Silver Dollar together?
A minimum of 75 gallons is recommended for keeping Royal Gramma and Silver Dollar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Royal Gramma and Silver Dollar?
75โ82ยฐF โ inside Royal Gramma's 72โ82ยฐF and Silver Dollar's 75โ82ยฐF.
Is a Royal Gramma aggressive toward a Silver Dollar?
Royal Gramma is semi and Silver Dollar is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Royal Gramma and Silver Dollar
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |