Dojo Loach Care Guide: The Friendly Weather Predictor

The dojo loach (Misgurnus anguillicaudatus), also known as the weather loach or pond loach, is one of the most personable freshwater fish you can keep. Famous for becoming restless before storms — hence its name — this elongated bottom-dweller quickly learns to eat from your hand. If you need a thorough dojo loach care guide tailored to Singapore conditions, Gensou Aquascaping at 5 Everton Park has been helping hobbyists for over two decades.

Dojo Loach Overview

Native to East Asia, dojo loaches inhabit slow-moving rivers, ponds and rice paddies. They grow to 15–25 cm in captivity and can live eight to ten years with proper care. Their eel-like body, barbels around the mouth and expressive eyes give them a charming, almost puppy-like appearance. Common colour variants include wild-type olive-brown and the popular gold or albino morph.

Tank Requirements

Dojo loaches need a minimum tank size of 150 litres for a group of three, as they are social fish that thrive in groups. A long tank footprint is better than a tall one since they spend most of their time on the bottom. They prefer cooler water between 18 °C and 24 °C, which makes them one of the few species in Singapore that genuinely benefits from a chiller or at least a cooling fan. Fine sand substrate is essential — they love to burrow, and gravel can damage their delicate barbels.

Water Parameters

Maintain pH between 6.5 and 8.0, GH of 5–12 dGH, and keep ammonia and nitrite at zero. They tolerate a wide range of conditions but are sensitive to poor water quality. Weekly water changes of 25–30 % are recommended. In Singapore’s climate, the biggest challenge is temperature — invest in a quality cooling fan or chiller to keep the tank below 25 °C during hot months.

Diet and Feeding

Dojo loaches are omnivorous and not fussy eaters. They accept sinking pellets, frozen bloodworms, tubifex, blanched vegetables and algae wafers. Their barbels help them root through the substrate for food, so sinking foods work best. Feed once or twice daily, providing only what they can consume within a few minutes. They particularly enjoy live or frozen foods as an occasional treat.

Behaviour and Personality

What sets dojo loaches apart is their remarkable tameness. Given time, most will swim to the surface when they see you approach and readily accept food from your fingers. They sometimes float motionless at odd angles — this is normal resting behaviour, not a sign of illness. Their barometric sensitivity causes increased activity before weather changes, swimming erratically or surfacing repeatedly.

Tank Mates

Dojo loaches are exceptionally peaceful. Good tank mates include goldfish (they share similar temperature preferences), white cloud mountain minnows, rosy barbs, Corydoras catfish and bristlenose plecos. Avoid keeping them with aggressive cichlids, very small shrimp (which may become snacks) or tropical fish that need temperatures above 26 °C.

Health Considerations

Dojo loaches are scaleless, making them sensitive to salt treatments and copper-based medications. Always use half-doses when treating with any medication and never use copper. Ich is the most common disease, often triggered by temperature fluctuations. Quarantine new additions for at least two weeks before introducing them to an established tank.

Singapore-Specific Advice

The biggest challenge of keeping dojo loaches in Singapore is managing temperature. A good-quality cooling fan can reduce water temperature by 2–4 °C, while a chiller offers more precise control. Position the tank away from direct sunlight and in an air-conditioned room if possible. Dojo loaches are occasionally available at speciality fish shops — ask your local store to order them if not in stock.

Conclusion

Dojo loaches reward their keepers with personality and charm that rival any dog or cat. While Singapore’s heat presents a challenge, the right equipment makes it entirely manageable. Visit Gensou Aquascaping at 5 Everton Park for advice on setting up a comfortable dojo loach tank in our tropical climate.