Clown Loach and Pygmy Corydoras Compatibility Overview
Clown Loach and Pygmy Corydoras are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 77โ79ยฐF, which leaves no margin for a heater drifting or a warm room. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Clown Loach | Pygmy Corydoras | Verdict |
|---|---|---|---|
| Temperature | 77โ86ยฐF | 72โ79ยฐF | โ ๏ธ 77โ79ยฐF (narrow) |
| pH Range | 6.0โ7.5 | 6.0โ7.5 | โ 6.0โ7.5 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 12 in | 1 in | โ 12ร difference |
| Min. Group | 5+ | 6+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Clown Loach โ Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
โ Full Clown Loach care guide
Pygmy Corydoras โ Corydoras pygmaeus
Tiny armoured catfish that school in open water as well as on the substrate. Peaceful with all non-aggressive species.
Frequently Asked Questions
Can Clown Loach live with Pygmy Corydoras?
Generally not recommended. Clown Loach and Pygmy Corydoras are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their ranges meet only at 77โ79ยฐF, which leaves no margin for a heater drifting or a warm room. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Clown Loach and Pygmy Corydoras together?
A minimum of 100 gallons is recommended for keeping Clown Loach and Pygmy Corydoras together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Clown Loach and Pygmy Corydoras?
77โ79ยฐF (narrow) โ inside Clown Loach's 77โ86ยฐF and Pygmy Corydoras's 72โ79ยฐF.
Is a Clown Loach aggressive toward a Pygmy Corydoras?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Clown Loach and Pygmy Corydoras
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 220 gal | Best when keeping larger schools or reducing territorial pressure. |