Can Hillstream Loach Live With Oscar?
Hillstream Loach and Oscar are NOT compatible tank mates.
Detailed Analysis
Temperature
⚠ Use Caution
Very narrow temperature overlap (74–75°F). Maintaining stable temp in this range may be difficult.
pH
✓ Compatible
Good pH overlap at 6.5–7.5.
Size
⚠ Use Caution
Significant size difference (14" vs 3"). Oscar may bully or stress Hillstream Loach.
Temperament
✗ Not Compatible
Hillstream Loach (peaceful) is not compatible with Oscar (aggressive). Aggression or stress is very likely.
Swim Level
✓ Compatible
Fish occupy different water levels (Hillstream Loach: bottom, Oscar: middle), reducing conflict.
Trait Conflict
✗ Not Compatible
Oscar is a predator and may eat Hillstream Loach.
Important Notes
- Hillstream Loach is a schooling fish and needs at least 3 of its kind.
Tank Requirements
Minimum tank size for this combination: 75 gallons
| Parameter | Hillstream Loach | Oscar |
|---|---|---|
| Temperature | 65–75°F | 74–81°F |
| pH | 6.5–7.5 | 6–7.5 |
| Max Size | 3" | 14" |
| Temperament | Peaceful | Aggressive |
| Swim Level | Bottom | Middle |
| Min Tank | 20 gal | 75 gal |
Check More Combinations
Use our compatibility checker to add more fish and plan your complete tank.