Can Congo Tetra Live With Royal Gramma?
Incompatible pH. Congo Tetra needs 6.0–7.5, Royal Gramma needs 8.1–8.4.
Parameter Comparison
| Parameter | Congo Tetra | Royal Gramma | Overlap |
|---|---|---|---|
| Temperature | 73–82°F | 75–80°F | 75–80°F ✓ |
| pH Range | 6–7.5 | 8.1–8.4 | No overlap ✗ |
| Temperament | peaceful | peaceful | Both peaceful ✓ |
| Max Size | 3.5" | 3" | Similar ✓ |
| Min Tank Size | 30 gal | 20 gal | 30 gal minimum together |
| Diet | Omnivore | Carnivore | — |
| Care Level | intermediate | beginner | — |
Species Profiles
Congo Tetra
Phenacogrammus interruptus
Congo tetras are the showstoppers of the tetra family. Males develop spectacular flowing fins with an iridescent rainbow sheen that shifts from blue to gold to green under aquarium lighting. They are larger than most tetras (up to 3.5 inches) and need a spacious, well-planted tank to display their full beauty. Peaceful but shy — they thrive with calm tank mates.
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 →