Fire Eel and Serpae Tetra Compatibility Overview
Fire Eel and Serpae 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 | Serpae Tetra | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 68โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 6.0โ7.0 | 5.0โ7.5 | โ 6.0โ7.0 |
| Temperament | semi | semi | โ ๏ธ Monitor |
| Adult Size | 39.4 in | 1.6 in | โ 25ร difference |
| Min. Group | 1+ | 10+ | 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.
Serpae Tetra โ Hyphessobrycon eques
The Serpae Tetra is a popular freshwater fish known for its vibrant coloration and peaceful nature. It is well-suited for community tanks and can be a great addition to any aquarium. With its moderate activity level and easy care requirements, it is a suitable choice for beginners and experienced aquarists alike.
Frequently Asked Questions
Can Fire Eel live with Serpae Tetra?
Generally not recommended. Fire Eel and Serpae 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 Serpae Tetra together?
A minimum of 100 gallons is recommended for keeping Fire Eel and Serpae Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Fire Eel and Serpae Tetra?
75โ82ยฐF โ inside Fire Eel's 75โ82ยฐF and Serpae Tetra's 68โ82ยฐF.
Is a Fire Eel aggressive toward a Serpae Tetra?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Fire Eel and Serpae 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. |