Cardinal Tetra and Serpae Tetra Compatibility Overview
Cardinal Tetra and Serpae Tetra can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Cardinal Tetra is peaceful and Serpae Tetra is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Serpae Tetra | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 68โ82ยฐF | โ 73โ82ยฐF |
| pH Range | 4.5โ7.0 | 5.0โ7.5 | โ 5.0โ7.0 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 1.6 in | โ Similar |
| Min. Group | 6+ | 10+ | See below |
| Min. Tank Size | 20 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
Serpae Tetra โ Hyphessobrycon eques
The Serpae Tetra is a popular freshwater fish known for its vibrant coloration and peaceful nature. It is well-suited for community tanks and can be a great addition to any aquarium. With its moderate activity level and easy care requirements, it is a suitable choice for beginners and experienced aquarists alike.
Frequently Asked Questions
Can Cardinal Tetra live with Serpae Tetra?
Yes, in a well-planned setup. Cardinal Tetra and Serpae Tetra can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Cardinal Tetra is peaceful and Serpae Tetra is semi, so give them room and cover rather than assuming they will ignore each other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Cardinal Tetra and Serpae Tetra together?
A minimum of 20 gallons is recommended for keeping Cardinal Tetra and Serpae Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Serpae Tetra?
73โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Serpae Tetra's 68โ82ยฐF.
Is a Cardinal Tetra aggressive toward a Serpae Tetra?
Cardinal Tetra is peaceful and Serpae Tetra is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Serpae Tetra
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 20 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 29 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 55 gal | Best when keeping larger schools or reducing territorial pressure. |