UFO Loach (Ambastaia sidthimunki) Care Guide

The UFO Loach, also known as the Sidthimunki Loach, is a small, peaceful freshwater fish named for the UFO-like markings on its body. Native to Southeast Asia, this charming bottom-dweller brings activity and unique patterning to community aquariums. ([Pet Zone San Diego][1])

Appearance
UFO Loaches remain compact, reaching only about 2.5 inches (6 cm) at full size. Their bodies display distinctive, circular "UFO" markings over a mottled background, making them visually captivating. ([Pet Zone San Diego][1])

Behavior and Temperament
They are peaceful and active, but can be shy around larger or more aggressive tankmates. These loaches do best in groups of three or more, which encourages natural behavior and reduces stress. ([Pet Zone San Diego][1])

Tank Requirements
A well-oxygenated, clean tank replicating their native environment is essential:

– Tank size: Minimum 10 gallons for a small group (preferably three or more) ([Pet Zone San Diego][1])
– Substrate: Soft sand or fine gravel to protect delicate barbels ([Pet Zone San Diego][1])
– Décor: Provide hiding places like rocks, caves, driftwood, and plants for security and enrichment ([Pet Zone San Diego][1])
– Water flow and oxygenation: Maintain good filtration and periodic water changes to ensure optimal water quality ([Pet Zone San Diego][1], [aqueon.com][2])

Water Parameters
– Temperature: 74–80 °F (23–27 °C)
– pH: 6.0–7.5
– Hardness: 5–15 dGH ([Pet Zone San Diego][1])

Diet
Omnivorous and adaptable feeders, UFO Loaches enjoy:

– High-quality sinking pellets or flakes
– Live or frozen foods such as bloodworms, brine shrimp
– Vegetable matter like blanched spinach or zucchini ([Pet Zone San Diego][1])

Compatibility
They thrive with small, non-aggressive community fish such as neon tetras, rasboras, corydoras catfish, and peaceful shrimp. Avoid pairing them with large or aggressive species that may stress or prey on them. ([Pet Zone San Diego][1])

Lifespan
With proper care, UFO Loaches can live 5 to 7 years. ([Pet Zone San Diego][1]