Cardinal Tetra and Glowlight Danio Compatibility Overview
Cardinal Tetra and Glowlight Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the other. A minimum 20-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Glowlight Danio | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 73โ79ยฐF | โ 73โ79ยฐF |
| pH Range | 4.5โ7.0 | 6.5โ7.5 | โ ๏ธ 6.5โ7.0 (narrow) |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 1.2 in | โ Similar |
| Min. Group | 6+ | 8+ | 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
Glowlight Danio โ Danio choprae
The Glowlight Danio is a popular freshwater fish known for its vibrant colors and active nature. They are ideal for beginners due to their hardiness and ease of care. These fish thrive in a well-maintained tank with plenty of swimming space and a school of their own kind.
Frequently Asked Questions
Can Cardinal Tetra live with Glowlight Danio?
Yes, in a well-planned setup. Cardinal Tetra and Glowlight Danio can generally share an aquarium with appropriate planning. Both species prefer overlapping temperature and pH ranges. Both species are peaceful, and neither poses a major aggression risk to the 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 Glowlight Danio together?
A minimum of 20 gallons is recommended for keeping Cardinal Tetra and Glowlight Danio together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Glowlight Danio?
73โ79ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Glowlight Danio's 73โ79ยฐF.
Is a Cardinal Tetra aggressive toward a Glowlight Danio?
Cardinal Tetra is peaceful and Glowlight Danio is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Glowlight Danio
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. |