Can Java Loach Live With Oscar?
Java Loach and Oscar are NOT compatible tank mates.
Detailed Analysis
Temperature
✓ Compatible
Good temperature overlap at 74–81°F.
pH
✓ Compatible
Good pH overlap at 6.0–7.0.
Size
⚠ Use Caution
Significant size difference (14" vs 3"). Oscar may bully or stress Java Loach.
Temperament
✗ Not Compatible
Java Loach (peaceful) is not compatible with Oscar (aggressive). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Java Loach: bottom, Oscar: middle), reducing conflict.
Trait Conflict
✗ Not Compatible
Oscar is a predator and may eat Java Loach.
Important Notes
- Java Loach is a schooling fish and needs at least 5 of its kind.
Tank Requirements
Minimum tank size for this combination: 75 gallons
| Parameter | Java Loach | Oscar |
|---|---|---|
| Temperature | 72–82°F | 74–81°F |
| pH | 5.5–7 | 6–7.5 |
| Max Size | 3" | 14" |
| Temperament | Peaceful | Aggressive |
| Swim Level | Bottom | Middle |
| Min Tank | 15 gal | 75 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.