Fire Eel and Red Eye Tetra Compatibility Overview
Fire Eel and Red Eye Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Both are semi, so give them a larger, well-planted tank and watch how they settle in. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Fire Eel | Red Eye Tetra | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 72โ79ยฐF | โ 75โ79ยฐF |
| pH Range | 6.0โ7.0 | 6.0โ8.0 | โ 6.0โ7.0 |
| Temperament | semi | semi | โ ๏ธ Monitor |
| Adult Size | 39.4 in | 2.8 in | โ 14ร difference |
| Min. Group | 1+ | 6+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Fire Eel โ Mastacembelus erythrotaenia
The Fire Eel is a stunning, red-bottomed species that requires a spacious tank. They are peaceful bottom feeders and do best in a well-planted, mature aquarium. With a moderate activity level, they can be a great addition to a community tank, but their size and diet may be incompatible with smaller fish.
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.
Frequently Asked Questions
Can Fire Eel live with Red Eye Tetra?
Generally not recommended. Fire Eel and Red Eye Tetra are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Both are semi, so give them a larger, well-planted tank and watch how they settle in. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Fire Eel and Red Eye Tetra together?
A minimum of 100 gallons is recommended for keeping Fire Eel and Red Eye Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Fire Eel and Red Eye Tetra?
75โ79ยฐF โ inside Fire Eel's 75โ82ยฐF and Red Eye Tetra's 72โ79ยฐF.
Is a Fire Eel aggressive toward a Red Eye Tetra?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Fire Eel and Red Eye Tetra
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 114 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 180 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |