Choosing Silver Dollar Tank Mates
Good Silver Dollar tank mates share the same temperature and pH window, will not be eaten by (or eat) the Silver Dollar, and do not compete for the same swimming zone or feeding time. Each pair guide below scores those factors from 0 to 100 and gives the minimum tank size for keeping both species together.
Start with the highest-scoring pairs; anything under 45 is listed so you know what to avoid, not as a recommendation.
Care baseline
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.
| Temperature | 75–82°F |
| pH | 6.0–7.0 |
| Adult size | 5.9 in |
| Minimum group | 5 |