How long do Hillstream Loaches live?
With cool, fast, well-oxygenated water they live about 5-8 years. Low oxygen and warm stagnant conditions are what cut that short.
What do Hillstream Loaches eat?
They graze aufwuchs and algae; supplement with blanched vegetables, sinking algae wafers, and frozen/live foods. The mistake is assuming they live on glass algae alone — they need real food and varied greens.
Tank size and water parameters
A 20-30 gallon (75-115 L) tank with strong flow suits a group of 3. Target 68-75°F (20-24°C), pH 6.5-7.5, moderate hardness, zero ammonia and nitrite, nitrate under 20 ppm, and high dissolved oxygen from powerheads or a river manifold. Keep in groups of 3+ on smooth rocks.
Common mistakes with Hillstream Loaches
Key errors: a warm, still tank with low oxygen (they suffocate and starve); no strong flow; too few fish; and inadequate algae/greens so they waste away.
Beginner mistakes to avoid
- Warm, still water — they need cool, highly oxygenated, flowing tanks.
- No strong current — a powerhead or river setup is essential.
- Assuming algae alone feeds them — supplement with wafers and greens.
- A tiny or lone group — keep 3+ on smooth rock surfaces.