A Unique Algae Grazer for Your Aquarium

The Blue Zebra Hillstream Loach (Gastromyzon sp.) is a rare and striking freshwater fish, known for its beautiful blue-black striped pattern and unique body shape. Adapted to fast-moving waters, this loach has a flattened body and specialized fins that help it cling to rocks and glass surfaces. It thrives in well-oxygenated, high-flow aquariums, making it an excellent choice for a river-style setup.

Beyond its stunning appearance, this species is a natural algae grazer, helping to maintain a clean and healthy aquarium by feeding on biofilm and soft algae.

Details

• Scientific Name: Gastromyzon sp.
• Common Names: Blue Zebra Hillstream Loach, Borneo Sucker Loach
• Size: 2–3 inches (adults)
• Lifespan: 5-8 years
• Temperament: Peaceful, best kept in groups

Water Parameters

• Temperature: 68-76°F (20-24°C)
• pH: 6.5-7.5
• Water Hardness: 5-12 dGH
• Flow & Oxygenation: Requires strong currents and high oxygen levels

Diet

The Blue Zebra Hillstream Loach is primarily an algae feeder, but a varied diet ensures optimal health:

• Primary Diet: Algae wafers, spirulina-based foods, and biofilm
• Live/Frozen Foods: Bloodworms, daphnia, and brine shrimp (as supplements)
• Natural Grazing: Feeds on soft algae and biofilm growing in the tank

Feed once or twice daily, ensuring a consistent source of algae or biofilm.

Tank Requirements

• Minimum Tank Size: 20 gallons (larger for groups)
• Substrate: Fine gravel or sand
• Tank Setup:
  • Smooth rocks and driftwood for biofilm growth
  • Live plants for natural cover
  • Strong water flow with sponge filters or powerheads

Behavior & Compatibility

• Peaceful and social, does best in groups of 3 or more
• Active bottom dweller, often seen clinging to rocks, driftwood, or glass
• Compatible Tank Mates:
  • Small, peaceful fish (Tetras, Rasboras, Danios, Guppies)
  • Other bottom dwellers (Corydoras, Otocinclus, Shrimp, Snails)
  • Other Hillstream Loaches (best in groups)

Avoid aggressive species such as large Cichlids or fin-nipping fish.