Hillstream Loach (Sewellia lineolata) – A Unique Algae-Eating Freshwater Fish
The Hillstream Loach (Sewellia lineolata) is one of the most fascinating and unique freshwater fish in the aquarium hobby. Recognized for its striking “stingray-like” body shape, intricate patterning, and strong algae-eating ability, the Hillstream Loach is both beautiful and beneficial. These peaceful bottom dwellers help maintain a clean tank by grazing on biofilm and algae, making them a perfect addition for aquarists who value both function and style in their aquarium.
Native to the fast-flowing mountain streams of Vietnam, China, and Southeast Asia, the Hillstream Loach thrives in cool, oxygen-rich environments.
Key Features
| Feature | Detail |
|---|---|
| Species | Sewellia lineolata |
| Size | Up to 5 inches (12 cm) |
| Temperament | Peaceful, social, bottom-dwelling |
| Water Conditions | Temperature: 65–78°F (18–26°C), pH 6.0–7.5, high oxygen flow |
| Diet | Algae, biofilm, sinking pellets, vegetable matter |
FAQ
What kind of water conditions does the Hillstream Loach prefer?
The Hillstream Loach prefers cool, oxygen-rich water with a temperature between 65–78°F (18–26°C), pH between 6.0 and 7.5, and strong water flow.
Is the Hillstream Loach aggressive or peaceful?
The Hillstream Loach is peaceful and social, making it ideal for community tanks with other non-aggressive fish.
What should I feed my Hillstream Loach?
Feed a varied diet including algae, biofilm, sinking pellets, and vegetable matter to ensure balanced nutrition.
Amelia Chapman –
I added a Hillstream Loach to my 10-gallon tank and it has been cleaning the bottom efficiently. It doesn’t stress other fish and looks great with the decor. The pattern is unique and adds visual interest to the tank.
Vanessa Edmunds –
The fish is active and stays near the substrate, eating algae consistently. I noticed less green film after a week. It’s a bit shy at first but settles in well.
Joshua Nash –
Perfect for a low-maintenance algae control solution. It’s peaceful, doesn’t chase other fish, and looks stunning with its body shape and coloration.