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Dwarf Chain Loach
Ambastaia sidthimunki
Animalia›Chordata›Actinopterygii›Botiidae
📍 Southeast Asia
One of the smallest loaches, the dwarf chain loach has a distinctive chain-link pattern and an endearingly playful personality. Unlike most loaches it is comfortable in the upper water column and is often seen resting on plant leaves. A prized nano loach.
Care Guide
Diet
Dwarf chain loaches are omnivores that require a varied diet of small foods. Offer high-quality micro pellets as a staple, supplemented 2-3 times weekly with live or frozen foods such as small bloodworms, daphnia, and brine shrimp. They will also consume small snails and algae wafers, and benefit from occasional vegetable matter like blanched zucchini.
Behavior
These playful, social loaches are most active during dawn and dusk, spending time both on the substrate and resting on plant leaves—unusual behavior for loaches. They are peaceful and should always be kept in groups of 6 or more to reduce stress and encourage natural schooling behavior. They are curious and entertaining to observe, often interacting with tank décor and each other.
Breeding
Breeding dwarf chain loaches in captivity is difficult and rarely achieved in home aquariums. They require very specific water conditions, including soft, acidic water and seasonal temperature fluctuations to trigger spawning. Successful breeding is primarily documented in specialized breeding facilities rather than community tanks.
Tank Mates
Similar size, peaceful temperament, and bottom-dwelling habits make them ideal companions
Small, peaceful fish with matching water parameter requirements and non-aggressive behavior
Peaceful invertebrates that occupy different niches; loaches may occasionally prey on shrimplets
Peaceful mid-water dweller with compatible temperature and pH requirements
Small, peaceful schooling fish that thrive in similar soft, acidic water conditions
Hardy plant that provides resting surfaces and shelter without being uprooted by loach activity
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, rubbing against objects, lethargy
Raise temperature gradually to 28-30°C, perform daily 25% water changes, use ich medication as directed; ensure excellent water quality
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Perform frequent water changes to improve water quality, treat with antibacterial medication, remove any sharp tank décor that may cause injury
Bacterial Infection
Sores or lesions on body, loss of appetite, cloudy eyes, behavioral changes
Improve water quality through increased water changes, use broad-spectrum antibiotic medication, quarantine if severe
Stress-Related Illness
Loss of appetite, hiding, faded coloration, weakened immunity
Ensure group size of 6+ loaches, maintain stable water parameters, provide adequate plant cover and hiding spaces, minimize tank disturbances
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Quick Facts
- diet
- Omnivore – micro pellets, small bloodworms, daphnia, snails
- lifespan
- 8–12 years
- max size
- 6 cm (2.4 in)
- tank size
- 20 gallons minimum
- school size
- 6+
- temperament
- Peaceful, social; playful
Water it likes
- ph
- 6.0–7.5
- ammonia
- 0 ppm
- nitrate
- <15 ppm
- hardness
- 3–12 dGH
- temperature
- 79–86°F (26–30°C)