Description
Gold Tail Hillstream Loach
Scientific Name: Beaufortia kweichowensis (or similar genus/species)
Common Names: Gold Tail Loach, Butterfly Loach, Golden Stream Loach
Overview
The Gold Tail Hillstream Loach is a stunning freshwater fish known for its golden-yellow caudal fin and streamlined, ray-like body. Native to fast-flowing streams in Asia, these loaches are specialized for high-oxygen environments with lots of water movement. Their peaceful nature and algae-eating habits make them a favorite among aquarists looking for a unique addition to a river-style tank.
Key Information
Size: Up to 2.5–3 inches (6–7.5 cm)
Lifespan: 5–8 years with proper care
Temperament: Peaceful, shy
Diet: Omnivore – prefers algae, biofilm, sinking wafers, blanched veggies
Swimming Level: Bottom-dweller
Habitat & Tank Setup
Tank Size: Minimum 20 gallons (long tank preferred for surface area)
Water Flow: Strong; replicate river/stream-like current
Substrate: Smooth gravel, rounded stones
Decor: Flat rocks, driftwood, live plants like Java fern and Anubias
Lighting: Moderate; enhances algae growth for grazing
Filtration: High-quality with strong flow and surface agitation
Water Parameters
Temperature: 68–75°F (20–24°C)
pH: 6.5–7.5
Hardness: Soft to moderate (3–10 dGH)
Oxygenation: Very high – essential for their health
Feeding
Diet Type: Omnivore
Favorites:
Algae wafers
Blanched zucchini or spinach
Repashy Soilent Green
Frozen daphnia or bloodworms (occasional treat)
Feeding Tip: Feed small amounts 1–2 times daily; ensure food reaches the bottom
Tankmates
Compatible With:
Other Hillstream Loaches
Peaceful small schooling fish (White Cloud Mountain Minnows, Rasboras)
Shrimp and snails
Avoid:
Aggressive or fast-swimming fish (Barbs, large Cichlids)
Poorly oxygenated community tanks
Care Notes
Sensitive to poor water quality – regular water changes are a must
Needs cool, well-oxygenated water year-round
Algae in the tank is beneficial – don’t over-clean surfaces
May become territorial with other loaches if space is too small
Fun Fact
When resting on a rock with their fins spread, they resemble a tiny stingray or aquatic butterfly — hence the name “Butterfly Loach.”