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FishintermediateFreshwater

Borneo Sucker Loach

Gastromyzon punctulatus

AnimaliaChordataActinopterygiiCypriniformesBalitoridae

📍 Borneo, Malaysia & Indonesia

Ask Finn

Spotted disc-shaped hillstream loach that suctions onto rocks and glass. Needs well-oxygenated, high-flow water.

Size2"
Min Tank20g
School3+
peaceful
Zonebottom

Care Guide

Diet

Borneo Sucker Loaches are primarily herbivorous and feed on biofilm, algae, and aufwuchs naturally found on rocks and driftwood. Supplement with high-quality algae wafers, blanched vegetables (zucchini, spinach), and occasional small frozen foods like bloodworms. Feed small amounts daily, as they graze continuously throughout the day.

Behavior

These peaceful, bottom-dwelling loaches are nocturnal and spend most of their time suctioned to rocks, driftwood, and glass surfaces using their specialized disc-like mouths. They are generally solitary or found in small groups in the wild, and while not aggressive, they can be territorial with other loaches. They require strong water flow and high oxygen levels to thrive, making them active swimmers in well-oxygenated tanks.

Breeding

Breeding Borneo Sucker Loaches in captivity is extremely difficult and rarely documented in the aquarium hobby. They require very specific environmental conditions including high flow, precise temperature, and likely seasonal triggers that are difficult to replicate. Most specimens in the trade are wild-caught, and successful captive breeding remains largely undocumented.

Common Diseases

Ich (Ichthyophthirius multifiliis)

Symptoms

White spots on body and fins, rapid breathing, flashing against surfaces

Treatment

Increase temperature gradually to 28°C, use ich medication, maintain excellent water quality and aeration

Bacterial Fin Rot

Symptoms

Frayed or deteriorating fins, discoloration at fin edges, lethargy

Treatment

Perform frequent water changes, improve water quality, use antibacterial medication if severe

Gill Parasites

Symptoms

Rapid gill movement, gasping at surface despite high oxygen, loss of appetite

Treatment

Use antiparasitic medication, increase aeration and water flow, quarantine affected fish

Poor Water Quality Stress

Symptoms

Loss of coloration, reduced feeding, clamped fins, lethargy

Treatment

Perform large water changes, check filtration and flow rates, test water parameters (pH, ammonia, nitrite)

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Quick Facts

pH
6.5–7.5
diet
herbivore/biofilm
maxSize
2 inches
minTankSize
20 gallons
temperature
68–77°F (20–25°C)

Temperature

68–77°F

20–25°C

Stats

Community tips0
Kept by0 hobbyists