Compatibility Overview
Cardinal Tetra and Ember Tetra 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 | Ember Tetra | Verdict |
|---|---|---|---|
| Temperature | 73–82°F | 73–84°F | ✅ 73–82°F |
| pH Range | 4.5–7.0 | 5.5–7.0 | ✅ 5.5–7.0 |
| Temperament | peaceful | peaceful | ✅ Compatible |
| Adult Size | 1.5 in | 0.8 in | ✅ Similar |
| Min. Group | 6+ | 8+ | 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
Ember Tetra — Hyphessobrycon amandae
Tiny orange-red schooling tetra that is among the most adaptable nano fish. Peaceful with everything too small to eat them.
Frequently Asked Questions
Can Cardinal Tetra live with Ember Tetra?
Yes, in a well-planned setup. Cardinal Tetra and Ember Tetra 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 Ember Tetra together?
A minimum of 40 gallons is recommended for keeping Cardinal Tetra and Ember Tetra together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Ember Tetra?
73–82°F
Is a Cardinal Tetra aggressive toward a Ember Tetra?
Cardinal Tetra is peaceful and Ember Tetra is peaceful. No major aggression issues are expected between these species.