Compatibility Overview
Clown Loach and Oscar can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 100-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Clown Loach | Oscar | Verdict |
|---|---|---|---|
| Temperature | 77–86°F | 74–81°F | ✅ 77–81°F |
| pH Range | 6.0–7.5 | 6.0–8.0 | ✅ 6.0–7.5 |
| Temperament | peaceful | aggressive | ❌ Risk |
| Adult Size | 12 in | 14 in | ✅ Similar |
| Min. Group | 5+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Clown Loach — Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
Oscar — Astronotus ocellatus
Intelligent but aggressive cichlids that will eat any fish small enough to fit in their mouth. Require large tanks (75+ gallons) and robust tank mates.
Frequently Asked Questions
Can Clown Loach live with Oscar?
Yes, in a well-planned setup. Clown Loach and Oscar can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 100-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Clown Loach and Oscar together?
A minimum of 100 gallons is recommended for keeping Clown Loach and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Loach and Oscar?
77–81°F
Is a Clown Loach aggressive toward a Oscar?
Clown Loach is peaceful and Oscar is aggressive. Narrow temperature overlap (77–81°F) — keeping the tank at exactly 78–80°F is needed for both species.