Meet the Red Tail Borneo Sucker Fish, also known as the Hillstream Loach. Discover care tips, tank mates, and more for your aquarium setup.

The Red Tail Borneo Sucker Fish, commonly referred to as the Hillstream Loach, is a unique and fascinating freshwater species originating from fast-flowing streams in Southeast Asia, particularly Borneo and Sumatra. Known for its flattened body and ability to cling to surfaces, this loach is admired for its striking appearance and intriguing behavior. Below is a comprehensive guide to understanding and caring for the Red Tail Borneo Sucker Fish:

Physical Characteristics:

• Size: Typically grows between 2.5 to 4 inches (6-10 cm) in length, with some individuals reaching up to 5 inches (12 cm) in ideal conditions.
• Coloration: The body is elongated and flattened, resembling a torpedo shape, with a pale brown to olive-green coloration. The distinguishing feature is its vibrant red or orange tail.

Tank Requirements:

• Tank Size: A minimum of 20 gallons is recommended for a small group of Hillstream Loaches due to their need for ample swimming space and strong water flow.
• Water Parameters: They thrive in cooler water temperatures ranging from 68-76°F (20-24°C), pH around 6.5-7.5, and moderate water hardness (5-15 dGH). Provide excellent water quality with strong filtration and regular water changes.
• Substrate and Décor: Use smooth rocks and fine gravel to mimic their natural habitat of fast-flowing streams. Incorporate driftwood, rocks, and live plants to create hiding spots and surfaces for algae growth, which they feed on.

Behavior and Temperament:

• Hillstream Loaches are peaceful and sociable, preferring to be in small groups.
• They are active during the day, often clinging to rocks or glass surfaces in search of food and shelter.
• Due to their preference for fast-flowing water, ensure the aquarium has adequate water movement provided by a powerhead or strong filter output.

Tank Mates:

• Suitable tank mates include other peaceful fish species that can tolerate similar water conditions, such as small tetras (e.g., Neon Tetras, Cardinal Tetras), rasboras, danios, and small catfish species.
• Avoid keeping with aggressive or fin-nipping fish that may stress or harm the Hillstream Loaches.

Feeding Habits:

• Hillstream Loaches are omnivorous and primarily feed on algae, biofilm, and small invertebrates in the wild.
• In the aquarium, provide a varied diet including algae wafers, sinking pellets, blanched vegetables (e.g., zucchini, cucumber), and occasional live or frozen foods like bloodworms or brine shrimp.
• Feed them multiple times a day in smaller portions to ensure they receive enough nutrition.

Breeding:

• Breeding Hillstream Loaches in captivity is challenging and rarely documented in home aquariums.
• They require specific conditions mimicking their fast-flowing stream habitats, including cooler temperatures and strong water currents.
• Successful breeding attempts often occur in specialized breeding setups with controlled water parameters and high oxygenation.

Health and Care:

• Maintain excellent water quality and perform regular water changes to prevent diseases and ensure the well-being of Hillstream Loaches.
• Monitor for signs of common aquarium ailments such as ich (white spot disease) and treat promptly if necessary.
• Provide a varied diet and ensure they have enough algae and biofilm to graze on, supplementing with commercial foods as needed.