Can Diamond Tetra Live With Jack Dempsey?
Diamond Tetra and Jack Dempsey are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 72–82°F.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (10" vs 2.5"). Jack Dempsey may bully or stress Diamond Tetra.
Temperament
✗ Not Compatible
Diamond Tetra (peaceful) is not compatible with Jack Dempsey (aggressive). Aggression or stress is very likely.
Swim Level
⚠ Use Caution
Both fish occupy the middle level and Jack Dempsey is territorial. Provide plenty of space and hiding spots.
Trait Conflict
✗ Not Compatible
Jack Dempsey is a predator and may eat Diamond Tetra.
Important Notes
- Diamond Tetra is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 55 gallons
| Parameter | Diamond Tetra | Jack Dempsey |
|---|---|---|
| Temperature | 72–82°F | 72–86°F |
| pH | 6–7.5 | 6.5–7.5 |
| Max Size | 2.5" | 10" |
| Temperament | Peaceful | Aggressive |
| Swim Level | Middle | Middle |
| Min Tank | 20 gal | 55 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.