Description
The Borneo Sucker Fish (Gastromyzon spp.), also known as the Hillstream Loach or Borneo Loach, is a fascinating bottom-dwelling species native to the fast-flowing, oxygen-rich streams of Borneo. This small, algae-eating fish is renowned for its unique body shape, which allows it to cling to smooth surfaces in high-current environments. Its distinct appearance and peaceful temperament make it a favourite among aquarists looking to recreate riverine ecosystems.
Features of a Borneo Sucker
-
Flattened, disc-shaped body adapted for fast-flowing waters
-
Striking pattern of stripes or spots depending on species
-
Suction-like mouth for grazing on algae
-
Peaceful, non-aggressive nature
-
Typically grows to 5–6 cm in length
The Best Aquarium Size for Borneo Sucker
A minimum tank size of 75 litres is recommended for a small group of Borneo Suckers. These fish thrive in well-oxygenated water with strong flow, so a horizontally-oriented tank with ample surface area is preferred over tall tanks. They do best when kept in small groups of three or more.
Tank Mate Compatibility for Borneo Sucker
The Borneo Sucker is compatible with other peaceful, cool-water species. Suitable tank mates include:
Diet for Borneo Sucker
Borneo Suckers are primarily herbivorous grazers. Their diet should consist of algae-based wafers, spirulina flakes, and blanched vegetables such as zucchini or spinach. Supplement with occasional protein sources like bloodworms or daphnia. They will also graze on biofilm and algae growing on rocks and tank surfaces.
Aquarium Setup for Borneo Sucker
Aquarium Filtration
Strong filtration is essential. A high-flow canister or powerhead system helps mimic their natural habitat and maintains oxygen-rich conditions.
Aquarium Plants
Use hardy, low-light plants such as Anubias, Java Fern, and Bolbitis. These should be attached to rocks or driftwood rather than planted in substrate.
Aquarium Lighting
Moderate lighting supports algae growth, which benefits the sucker’s natural grazing behaviour. Avoid overly intense lighting, which may stress the fish.
Aquarium Heating
Maintain water temperatures between 20°C and 24°C. Stability is key; sudden fluctuations should be avoided.
Aquarium Substrate
Smooth river rocks and fine sand are ideal. Avoid sharp gravel that can injure their delicate undersides.
Aquarium Decorations
Use natural driftwood, caves, and smooth stones to create hiding spots and replicate stream-like environments. Ensure decorations do not restrict water flow.
