Choosing Pajama Cardinalfish Tank Mates
Good Pajama Cardinalfish tank mates share the same temperature and pH window, will not be eaten by (or eat) the Pajama Cardinalfish, 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 Pajama Cardinalfish is a popular, beginner-friendly fish that can add a splash of color to your aquarium. They are generally peaceful and can be kept in a community tank. With moderate activity levels and a preference for undisturbed swimming spaces, they require a well-maintained water quality and a spacious tank.
| Temperature | 72–82°F |
| pH | 8.1–8.4 |
| Adult size | 3.5 in |
| Minimum group | 3 |