Can Silver Dollar Fish Live With Blue Tang (Regal Tang)?
Incompatible pH. Silver Dollar Fish needs 5.5–7.5, Blue Tang (Regal Tang) needs 8.1–8.4.
Parameter Comparison
| Parameter | Silver Dollar Fish | Blue Tang (Regal Tang) | Overlap |
|---|---|---|---|
| Temperature | 75–82°F | 75–82°F | 75–82°F ✓ |
| pH Range | 5.5–7.5 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | semi-aggressive | Monitor ⚠ |
| Max Size | 6" | 12" | Similar ✓ |
| Min Tank Size | 55 gal | 75 gal | 75 gal minimum together |
| Diet | Herbivore | Omnivore | — |
| Care Level | intermediate | intermediate | — |
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 →Blue Tang (Regal Tang)
Paracanthurus hepatus
The blue tang — Dory from Finding Nemo — is one of the most recognizable marine fish with its vivid royal blue body, black palette marking, and yellow tail. While stunning, they grow large (up to 12 inches), are highly susceptible to ich, and need tanks of 75+ gallons. They are not beginner fish despite their popularity following the movies.
Full care guide →