Choosing Threadfin Rainbowfish Tank Mates
Good Threadfin Rainbowfish tank mates share the same temperature and pH window, will not be eaten by (or eat) the Threadfin Rainbowfish, 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 Threadfin Rainbowfish is a popular choice for freshwater aquariums due to its vibrant colors and peaceful nature. It requires a well-maintained tank with plenty of swimming space and a moderate water flow. These fish are not known to be aggressive and can be kept in community tanks with other peaceful species.
| Temperature | 72–86°F |
| pH | 5.0–8.0 |
| Adult size | 1.6 in |
| Minimum group | 6 |