Compatibility Overview
Cardinal Tetra and Tiger Barb can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges, and neither poses a major aggression risk to the other. A minimum 40-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Tiger Barb | Verdict |
|---|---|---|---|
| Temperature | 73–82°F | 68–79°F | ✅ 73–79°F |
| pH Range | 4.5–7.0 | 6.0–8.0 | ✅ 6.0–7.0 |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 1.5 in | 2.75 in | ✅ Similar |
| Min. Group | 6+ | 6+ | See below |
| Min. Tank Size | 40 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Cardinal Tetra — Paracheirodon axelrodi
Brilliant red-and-blue schooling fish from the Rio Negro. Prefers soft, acidic, warm water — a natural companion for discus.
→ Full Cardinal Tetra care guide
Tiger Barb — 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, and neither poses a major aggression risk to the other. A minimum 40-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 40 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?
73–79°F
Is a Cardinal Tetra aggressive toward a Tiger Barb?
Cardinal Tetra is peaceful and Tiger Barb is semi. Minor aggression possible from the semi-aggressive species; provide hiding spots.