Hillstream Loach — Fish Profile
Sewellia lineolata
Quick Specs
| Adult Size: | 2.5" |
| Temperament: | peaceful |
| Care Level: | intermediate |
| Min Tank Size: | 20 gallons |
| Temperature: | 64-75°F |
| pH Range: | 6.5-7.5 |
| Diet: | herbivore |
| Origin: | Southeast Asia (Vietnam, Laos) |
| Lifespan: | 8-10 years |
Overview
Hillstream Loaches are fascinating flat-bodied fish that cling to rocks in fast-flowing streams. They require high oxygen and strong water flow, making them ideal for river-style setups. They eat algae and biofilm and are peaceful community fish.
Care Guide for Hillstream Loach
Tank Setup
Hillstream Loach requires a minimum tank size of 20 gallons. Maintain water temperature between 64°F and 75°F, with a pH range of 6.5 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Hillstream Loach with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Hillstream Loach is a herbivore feeder. Provide a varied diet appropriate for herbivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as peaceful. Hillstream Loach reaches an adult size of 2.5 inches and has a care level of intermediate. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Hillstream Loach originates from Southeast Asia (Vietnam, Laos) and has an expected lifespan of 8-10 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
Compatibility Results for Hillstream Loach
All 69 compatibility checks involving Hillstream Loach:
Recommended for Hillstream Loach
API Algae Wafers — $8.99Algae wafers for herbivorous bottom feeders
Expert Care Tips for Hillstream Loach
- Mid-size tank: Hillstream Loach needs 20+ gallons. Choose a tank at least 2× as long as the fish's adult size (2.5") for adequate swimming room.
- Cool-water species: Hillstream Loach tolerates temperatures as low as 64°F. In most homes, no heater is needed, but watch for summer overheating above 75°F.
- Narrow pH tolerance: Hillstream Loach only tolerates pH 6.5–7.5. Test your tap water before buying — adjusting pH is harder than choosing the right fish for your water.
- Peaceful community fish: Hillstream Loach works well in community tanks. Still, avoid housing with fish large enough to eat them — a 2.5" fish is vulnerable to anything with a mouth bigger than 2×.
- Acclimation: Always drip-acclimate Hillstream Loach over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.