Fire Eel and Silver Dollar Compatibility Overview
Fire Eel and Silver Dollar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Fire Eel | Silver Dollar | Verdict |
|---|---|---|---|
| Temperature | 75โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 6.0โ7.0 | 6.0โ7.0 | โ 6.0โ7.0 |
| Temperament | semi | peaceful | โ ๏ธ Monitor |
| Adult Size | 39.4 in | 5.9 in | โ 7ร difference |
| Min. Group | 1+ | 5+ | 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.
Silver Dollar โ Metynnis argenteus
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school.
Frequently Asked Questions
Can Fire Eel live with Silver Dollar?
Generally not recommended. Fire Eel and Silver Dollar are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Fire Eel and Silver Dollar together?
A minimum of 100 gallons is recommended for keeping Fire Eel and Silver Dollar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Fire Eel and Silver Dollar?
75โ82ยฐF โ inside Fire Eel's 75โ82ยฐF and Silver Dollar's 75โ82ยฐF.
Is a Fire Eel aggressive toward a Silver Dollar?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Fire Eel and Silver Dollar
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. |