Cardinal Tetra and Clown Loach Compatibility Overview
Cardinal Tetra and Clown Loach are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
| Factor | Cardinal Tetra | Clown Loach | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 77โ86ยฐF | โ 77โ82ยฐF |
| pH Range | 4.5โ7.0 | 6.0โ7.5 | โ 6.0โ7.0 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 12 in | โ 8ร difference |
| Min. Group | 6+ | 5+ | See below |
| Min. Tank Size | 100 gallons (for both species) | โ | |
Compatibility Positives
Incompatibility Reasons
Species Profiles
Cardinal Tetra โ Paracheirodon axelrodi
Brilliant red-and-blue schooling fish from the Rio Negro. Prefers soft, acidic, warm water โ a natural companion for discus.
โ Full Cardinal Tetra care guide
Clown Loach โ Chromobotia macracanthus
Striking striped loach that grows very large. Peaceful with fish but will eat shrimp, snails and tiny fish.
Frequently Asked Questions
Can Cardinal Tetra live with Clown Loach?
Generally not recommended. Cardinal Tetra and Clown Loach are generally not recommended to be housed together. The adult size gap creates a meaningful predation risk. Their pH ranges overlap only partly, so aim for the shared band and keep it steady. Review the behavior and water details before deciding whether to attempt the pairing.
What tank size do I need for Cardinal Tetra and Clown Loach together?
A minimum of 100 gallons is recommended for keeping Cardinal Tetra and Clown Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Clown Loach?
77โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Clown Loach's 77โ86ยฐF.
Is a Cardinal Tetra aggressive toward a Clown Loach?
The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Clown Loach
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. |