Redtail Loach
Cobitoidea sp.
Redtail Loach (Cobitoidea sp.) — Intermediate care, Peaceful, under Loach. Minimum tank in the app: 75 US gal min; aim for 73–82°F and pH 6–7.8. The Redtail Loach is an engaging choice for aquarists looking for a dynamic bottom-dweller that thrives in a spacious environment.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Redtail Loach Tank Setup
A minimum of 285 liters is essential, with ample open swimming space complemented by hiding spots such as caves or dense foliage to provide security. Moderate water flow is preferred, along with a substrate that allows for natural foraging behaviors and a lighting scheme that mimics their native habitat, enhancing their natural colors and activity levels.
What Do Redtail Loachs Eat?
As omnivores, Redtail Loaches exhibit moderate feeding speeds, necessitating the provision of varied diets that include both plant matter and protein sources. Care should be taken to spread out feeding locations to reduce competition and ensure all fish receive adequate nutrition, promoting vibrant health and coloration.
Redtail Loach Tank Mates
Ideal companions include robust mid-sized fish that can handle their semi-aggressive tendencies, such as larger tetras or barbs. Smaller, timid species are at risk of stress or harassment, while intraspecies dynamics are generally harmonious as long as they have enough space to establish territory without conflict.
Are Redtail Loachs Good for Beginners?
We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. Aquarists often underestimate their need for space and filtration, leading to poor water quality and stress. failing to provide sufficient hiding spots can result in aggression, while a lack of food variety may lead to nutritional deficiencies and health issues.
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