Borneo Sucker

The Borneo Sucker, commonly sold under hillstream loach varieties such as Gastromyzon species, is a fascinating freshwater fish for aquarists who enjoy unusual bottom dwellers and river-style tanks. Its flattened body, wide fins, and clinging behaviour make it stand out from typical community fish, while its calm nature allows it to fit into peaceful setups when water movement and oxygen levels are kept high.

This fish does best in mature aquariums with clean, cool-to-moderate temperature water, smooth stones, and surfaces where biofilm and soft algae can develop. It is not a typical scavenger that will thrive in neglected tanks, so stable parameters, good filtration, and regular maintenance are important for long-term success.

Key Features

• Appearance: Flattened body with broad pectoral fins designed for clinging to rocks, glass, and décor in flowing water.
• Size: Usually sold as a small specimen and generally reaches around 5 to 7 cm when fully grown.
• Colors: Attractive earthy tones with patterned markings that help it blend beautifully with stone and river-style aquascapes.
• Lifespan: With proper care, clean water, and a mature setup, it can live for several years in the home aquarium.
• Temperament: Peaceful and non-aggressive, making it suitable for calm community tanks with other gentle fish.
• Water Type: Freshwater species that prefers highly oxygenated water with steady current and low organic waste.

Care Requirements

• Tank Size: A tank of at least 60 litres is recommended, though larger aquariums offer better oxygen stability and more grazing area.
• Water Parameters: Ideal temperature is about 20 to 25°C with pH around 6.5 to 7.5. Strong aeration and flow are more important than simply keeping the water warm.
• Diet: Feeds on biofilm, soft algae, sinking wafers, blanched vegetables, and occasional protein-rich micro foods. Do not rely only on leftover food in the tank.
• Tank Mates: Best kept with peaceful small fish that enjoy similar clean-water conditions. Avoid aggressive cichlids, fin-nippers, or very large predators.
• Care Tips: Use smooth rocks, rounded pebbles, and good filtration to create a stream-like environment. A mature tank with natural algae growth helps this fish settle better.
• Setup Style: River manifold or high-flow aquariums with extra dissolved oxygen are ideal. Tight lids are useful because active fish may dart when startled.

Borneo Suckers are a great choice for hobbyists looking for an active, character-rich algae grazer that is different from common bottom fish. For best results, add them to established aquariums rather than newly set up tanks, and prioritise flow, oxygen, and surface grazing opportunities over heavy feeding.