Choosing Hillstream Loach Tank Mates
Good Hillstream Loach tank mates share the same temperature and pH window, will not be eaten by (or eat) the Hillstream Loach, 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
Sewellia lineolata, known as the Hillstream Loach, is a fascinating species for aquarists. These fish require a well-oxygenated, clear water environment with plenty of hiding spots. With a lifespan of 7 years, they are a long-term commitment. Their olive green color and slender body shape add a unique aesthetic to the tank.
| Temperature | 68–75°F |
| pH | 6.0–7.5 |
| Adult size | 2.6 in |
| Minimum group | 4 |