Red Eye Tetra and Royal Gramma Compatibility Overview
Red Eye Tetra and Royal Gramma 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: Red Eye Tetra wants 6.0โ8.0 and Royal Gramma wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Red Eye Tetra | Royal Gramma | Verdict |
|---|---|---|---|
| Temperature | 72โ79ยฐF | 72โ82ยฐF | โ 72โ79ยฐF |
| pH Range | 6.0โ8.0 | 8.1โ8.4 | โ No overlap |
| Temperament | semi | semi | โ ๏ธ Monitor |
| Adult Size | 2.8 in | 3.0 in | โ Similar |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 20 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Red Eye Tetra โ Moenkhausia sanctaefilomenae
The Red Eye Tetra is a popular freshwater fish known for its vibrant red eyes and sleek, silver body. They are generally peaceful and can be kept in a community tank with other non-aggressive species. Their moderate activity level makes them suitable for a variety of aquarium setups. With proper care, they can live up to 5 years.
โ Full Red Eye Tetra care guide
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.
Frequently Asked Questions
Can Red Eye Tetra live with Royal Gramma?
Generally not recommended. Red Eye Tetra and Royal Gramma 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: Red Eye Tetra wants 6.0โ8.0 and Royal Gramma wants 8.1โ8.4. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Red Eye Tetra and Royal Gramma together?
A minimum of 20 gallons is recommended for keeping Red Eye Tetra and Royal Gramma together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Red Eye Tetra and Royal Gramma?
72โ79ยฐF โ inside Red Eye Tetra's 72โ79ยฐF and Royal Gramma's 72โ82ยฐF.
Is a Red Eye Tetra aggressive toward a Royal Gramma?
Red Eye Tetra is semi and Royal Gramma is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Red Eye Tetra and Royal Gramma
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 30 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 55 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 75 gal | Best when keeping larger schools or reducing territorial pressure. |