Can Jack Dempsey Live With Julii Corydoras?
Jack Dempsey and Julii Corydoras are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 72–79°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (10" vs 2"). Jack Dempsey may bully or stress Julii Corydoras.
Temperament
✗ Not Compatible
Jack Dempsey (aggressive) is not compatible with Julii Corydoras (peaceful). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Jack Dempsey: middle, Julii Corydoras: bottom), reducing conflict.
Trait Conflict
✗ Not Compatible
Jack Dempsey is a predator and may eat Julii Corydoras.
Important Notes
- Julii Corydoras is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 63 gallons
| Parameter | Jack Dempsey | Julii Corydoras |
|---|---|---|
| Temperature | 72–86°F | 72–79°F |
| pH | 6.5–7.5 | 6–7.5 |
| Max Size | 10" | 2" |
| Temperament | Aggressive | Peaceful |
| Swim Level | Middle | Bottom |
| Min Tank | 55 gal | 15 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.