Cardinal Tetra and Silver Dollar Compatibility Overview
Cardinal Tetra and Silver Dollar 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 75-gallon tank is recommended to provide adequate territory and water volume for both species.
| Factor | Cardinal Tetra | Silver Dollar | Verdict |
|---|---|---|---|
| Temperature | 73โ82ยฐF | 75โ82ยฐF | โ 75โ82ยฐF |
| pH Range | 4.5โ7.0 | 6.0โ7.0 | โ 6.0โ7.0 |
| Temperament | peaceful | peaceful | โ Compatible |
| Adult Size | 1.5 in | 5.9 in | โ ๏ธ 3.9ร difference |
| Min. Group | 6+ | 5+ | See below |
| Min. Tank Size | 75 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
Silver Dollar โ Metynnis argenteus
The Metynnis argenteus, known as the Silver Dollar fish, is a popular freshwater species with a distinctive silver color and disc-shaped body. They require a spacious tank and are best kept in groups to prevent bullying. Their peaceful nature makes them suitable for community tanks, but they are not known to school.
Frequently Asked Questions
Can Cardinal Tetra live with Silver Dollar?
Yes, in a well-planned setup. Cardinal Tetra and Silver Dollar 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 75-gallon tank is recommended to provide adequate territory and water volume for both species.
What tank size do I need for Cardinal Tetra and Silver Dollar together?
A minimum of 75 gallons is recommended for keeping Cardinal Tetra and Silver Dollar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Cardinal Tetra and Silver Dollar?
75โ82ยฐF โ inside Cardinal Tetra's 73โ82ยฐF and Silver Dollar's 75โ82ยฐF.
Is a Cardinal Tetra aggressive toward a Silver Dollar?
Cardinal Tetra is peaceful and Silver Dollar is peaceful. No major aggression issues are expected between these species.
Related Compatibility Guides
Tank Size for Cardinal Tetra and Silver Dollar
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 75 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 125 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 150 gal | Best when keeping larger schools or reducing territorial pressure. |