Can Congo Tetra Live With Least Killifish?
Congo Tetra and Least Killifish CAN coexist, but with some risks. Careful setup and monitoring required.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 73–80°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (3.5" vs 1"). Congo Tetra may bully or stress Least Killifish.
Temperament
✓ Compatible
Both fish have compatible temperaments.
Swim Level
✓ Compatible
Fish occupy different water levels (Congo Tetra: middle, Least Killifish: top), reducing conflict.
Important Notes
- Congo Tetra is a schooling fish and needs at least 6 of its kind.
- Least Killifish is a schooling fish and needs at least 4 of its kind.
Tank Requirements
Minimum tank size for this combination: 33 gallons
| Parameter | Congo Tetra | Least Killifish |
|---|---|---|
| Temperature | 73–82°F | 66–80°F |
| pH | 6–7.5 | 6.5–8 |
| Max Size | 3.5" | 1" |
| Temperament | Peaceful | Peaceful |
| Swim Level | Middle | Top |
| Min Tank | 30 gal | 5 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.