Compatibility Overview
Cardinal Tetra and Dwarf Gourami 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 55-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Dwarf Gourami | Verdict |
|---|---|---|---|
| Temperature | 73–82°F | 72–82°F | ✅ 73–82°F |
| pH Range | 4.5–7.0 | 6.0–7.5 | ✅ 6.0–7.0 |
| Temperament | peaceful | semi | ⚠️ Monitor |
| Adult Size | 1.5 in | 3.5 in | ⚠️ 2.3× difference |
| Min. Group | 6+ | 1+ | See below |
| Min. Tank Size | 55 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
Dwarf Gourami — Trichogaster lalius
Colourful labyrinth fish that is generally peaceful but can be territorial toward similar species. Susceptible to Dwarf Gourami Iridovirus.
Frequently Asked Questions
Can Cardinal Tetra live with Dwarf Gourami?
Yes, in a well-planned setup. Cardinal Tetra and Dwarf Gourami 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 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 Dwarf Gourami together?
A minimum of 55 gallons is recommended for keeping Cardinal Tetra and Dwarf Gourami together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Dwarf Gourami?
73–82°F
Is a Cardinal Tetra aggressive toward a Dwarf Gourami?
Cardinal Tetra is peaceful and Dwarf Gourami is semi. Minor aggression possible from the semi-aggressive species; provide hiding spots.