Can Cardinal Tetra Live With Fire Eel?
Cardinal Tetra and Fire Eel are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 75–82°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.0.
Size
✗ Not Compatible
Extreme size difference. Fire Eel (24") may eat or bully Cardinal Tetra (2").
Temperament
⚠ Use Caution
Cardinal Tetra (peaceful) may have issues with Fire Eel (semi-aggressive). Monitor closely if attempting.
Swim Level
✓ Compatible
Fish occupy different water levels (Cardinal Tetra: middle, Fire Eel: bottom), reducing conflict.
Trait Conflict
✗ Not Compatible
Fire Eel is a predator and may eat Cardinal Tetra.
Important Notes
- Cardinal Tetra is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 75 gallons
| Parameter | Cardinal Tetra | Fire Eel |
|---|---|---|
| Temperature | 73–84°F | 75–82°F |
| pH | 5–7 | 6.5–7.5 |
| Max Size | 2" | 24" |
| Temperament | Peaceful | Semi-aggressive |
| Swim Level | Middle | Bottom |
| Min Tank | 10 gal | 75 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.