Can Silver Dollar Fish Live With Royal Gramma?
Incompatible pH. Silver Dollar Fish needs 5.5–7.5, Royal Gramma needs 8.1–8.4.
Parameter Comparison
| Parameter | Silver Dollar Fish | Royal Gramma | Overlap |
|---|---|---|---|
| Temperature | 75–82°F | 75–80°F | 75–80°F ✓ |
| pH Range | 5.5–7.5 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 6" | 3" | Similar ✓ |
| Min Tank Size | 55 gal | 20 gal | 55 gal minimum together |
| Diet | Herbivore | Carnivore | — |
| Care Level | intermediate | beginner | — |
Species Profiles
Silver Dollar Fish
Metynnis hypsauchen
Silver dollars are large, disc-shaped, peaceful schooling fish related to piranhas — but entirely herbivorous. Their shimmering silver body catches light beautifully in motion. They are excellent dither fish for large cichlid tanks because their calm, open-water swimming behavior helps reduce cichlid aggression. Warning: they will eat every live plant in your tank.
Full care guide →Royal Gramma
Gramma loreto
The royal gramma is one of the most stunning and beginner-friendly saltwater fish. Its front half is vivid purple transitioning to bright yellow on the back — a color combination unmatched in the marine world. They are hardy, disease-resistant, reef-safe, and stay small. Often considered one of the top 3 beginner saltwater fish alongside clownfish and firefish.
Full care guide →