Can Jack Dempsey Live With Otocinclus?
Jack Dempsey and Otocinclus 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
✗ Not Compatible
Extreme size difference. Jack Dempsey (10") may eat or bully Otocinclus (1.5").
Temperament
✗ Not Compatible
Jack Dempsey (aggressive) is not compatible with Otocinclus (peaceful). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Jack Dempsey: middle, Otocinclus: bottom), reducing conflict.
Trait Conflict
✗ Not Compatible
Jack Dempsey is a predator and may eat Otocinclus.
Important Notes
- Otocinclus is a schooling fish and needs at least 6 of its kind.
Tank Requirements
Minimum tank size for this combination: 60 gallons
| Parameter | Jack Dempsey | Otocinclus |
|---|---|---|
| Temperature | 72–86°F | 72–79°F |
| pH | 6.5–7.5 | 6–7.5 |
| Max Size | 10" | 1.5" |
| Temperament | Aggressive | Peaceful |
| Swim Level | Middle | Bottom |
| Min Tank | 55 gal | 10 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.