Cardinal Tetra and Tiger Barb Compatibility Overview
Cardinal Tetra and Tiger Barb can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Cardinal Tetra is peaceful and Tiger Barb 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 | Tiger Barb | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 68โ79ยฐF | โ 73โ79ยฐF |
| pH Range | 4.5โ7.0 | 6.0โ8.0 | โ 6.0โ7.0 |
| Temperament | peaceful | semi | โ ๏ธ Monitor |
| Adult Size | 1.5 in | 2.75 in | โ Similar |
| Min. Group | 6+ | 6+ | 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
Tiger Barb โ Puntigrus tetrazona
Striking striped barbs that are notorious fin-nippers. Must be kept in groups of 6+ to redirect aggression within the school. Incompatible with long-finned fish.
Frequently Asked Questions
Can Cardinal Tetra live with Tiger Barb?
Yes, in a well-planned setup. Cardinal Tetra and Tiger Barb can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Cardinal Tetra is peaceful and Tiger Barb 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 Tiger Barb together?
A minimum of 20 gallons is recommended for keeping Cardinal Tetra and Tiger Barb together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Tiger Barb?
73โ79ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Tiger Barb's 68โ79ยฐF.
Is a Cardinal Tetra aggressive toward a Tiger Barb?
Cardinal Tetra is peaceful and Tiger Barb is semi. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Tiger Barb
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. |