Can Blue Tetra Live With Least Killifish?
Blue 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
✓ Compatible
Compatible sizes (2.5" and 1").
Temperament
⚠ Use Caution
Blue Tetra (semi-aggressive) may have issues with Least Killifish (peaceful). Monitor closely if attempting.
Swim Level
✓ Compatible
Fish occupy different water levels (Blue Tetra: middle, Least Killifish: top), reducing conflict.
Important Notes
- Blue 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: 23 gallons
| Parameter | Blue Tetra | Least Killifish |
|---|---|---|
| Temperature | 73–82°F | 66–80°F |
| pH | 6–7.5 | 6.5–8 |
| Max Size | 2.5" | 1" |
| Temperament | Semi-aggressive | Peaceful |
| Swim Level | Middle | Top |
| Min Tank | 20 gal | 5 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.