Cardinal Tetra and Kuhli Loach Compatibility Overview
Cardinal Tetra and Kuhli Loach can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Kuhli Loach | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 73โ82ยฐF | โ 73โ82ยฐF |
| pH Range | 4.5โ7.0 | 5.5โ7.0 | โ 5.5โ7.0 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 3.5 in | โ ๏ธ 2.3ร difference |
| Min. Group | 6+ | 3+ | See below |
| Min. Tank Size | 55 gallons (for both species) | โ | |
Compatibility Positives
Caution Points
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
Kuhli Loach โ Pangio kuhlii
Eel-like bottom dwellers that are peaceful with all non-aggressive fish. Nocturnal and reclusive; need caves and soft substrate.
Frequently Asked Questions
Can Cardinal Tetra live with Kuhli Loach?
Yes, in a well-planned setup. Cardinal Tetra and Kuhli Loach can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 55-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Cardinal Tetra and Kuhli Loach together?
A minimum of 55 gallons is recommended for keeping Cardinal Tetra and Kuhli Loach together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Kuhli Loach?
73โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Kuhli Loach's 73โ82ยฐF.
Is a Cardinal Tetra aggressive toward a Kuhli Loach?
Cardinal Tetra is peaceful and Kuhli Loach is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Kuhli Loach
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |