What size tank does a Hillstream Loach need?

Hillstream Loach needs a minimum of 20 gallons, with 30 gallons recommended. They are bottom swimmers. Keep in groups of 3+.

Is Hillstream Loach good for beginners?

Hillstream Loach is rated "intermediate" difficulty (3/5). Suitable for intermediate fishkeepers.

What fish are compatible with Hillstream Loach?

Hillstream Loach is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6.5-7.5, temp 65-75°F).

Hillstream Loach

Sewellia lineolata

Family: Gastromycidae • Origin: Southeast Asia

Hillstream Loaches are flat, bizarre-looking fish adapted to fast-flowing streams. They cling to rocks and glass, eating biofilm and algae.

Min Tank

20 gal

Max Size

Temperature

65-75°F

6.5-7.5

Lifespan

8 years

School Size

Swim Level

bottom

Hardness

5-12 dGH

peacefulintermediateherbivoreschooling

Is Hillstream Loach Right for Your Tank?

Hillstream Loach is a moderate-care fish rated "intermediate" (3/5). Suitable for hobbyists with some experience who can maintain stable water parameters. A 20-gallon tank minimum is standard — most community setups will accommodate them.

With a peaceful temperament, Hillstream Loach makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 3 together, or they may become stressed and display abnormal behavior. Expected lifespan: 8 years with proper care.

Common Mistakes with Hillstream Loach

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Keeping fewer than 3 together

Hillstream Loach is a schooling species — they need a group of at least 3 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Putting them in a tank under 20 gallons

Many beginners underestimate tank size needs. Hillstream Loach requires at least 20 gallons — ideally 30. Cramped tanks lead to stunted growth, aggression, and poor water quality.