🐟 AquaticCare difficulty: AdvancedLegal complexity: Low
Clown Loach
Chromobotia macracanthus · also called Tiger Botia, Clown Botia, Tiger Loach
A striking orange-and-black banded loach that grows large, lives for decades, and must be kept in active social groups. Their adult size and lifespan make them a serious, advanced-level commitment despite their cute, small juvenile appearance.
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Quick facts
| Size | Large botiid loach commonly reaching 20-30 cm (8-12 in) in captivity, occasionally larger. |
| Lifespan | 15–25 years |
| Social needs | group |
| Native region | Southeast Asia (islands of Borneo and Sumatra, Indonesia) |
| Origin | Old World |
| Climate | 🌴 Tropical |
| Water type | 💧 Freshwater |
| Family | Botiidae |
| Genus | Chromobotia |
Part of the Loaches
Bottom-dwelling, often social fish prized for sifting substrate, controlling pest snails, and adding constant motion to the lower levels of the aquarium. Most are scaleless or fine-scaled and sensitive to medications.
Habitat & space requirements
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Habitat & enclosure
Often sold as small juveniles, clown loaches reach 20-30 cm and need a large aquarium; plan for at least 450-560 litres (120-150 US gal) for a proper group of five or more adults, with a long footprint and strong filtration. Use a soft sand substrate, plenty of caves, driftwood, rockwork, and robust plants, and cover the tank well. They are highly social and become stressed, sickly, or aggressive when kept alone or in too-small groups.
They are tropical: keep water at 25-30 C (77-86 F), pH 6.0-7.5, soft to moderately hard, with brisk, well-oxygenated flow and meticulous water quality. As scaleless fish they need stable, pristine conditions and a fully matured tank. Their long lifespan and eventual size mean the enclosure must be planned for the adult animal, not the juvenile.
Substrate
Use smooth, fine sand or rounded gravel so these bottom-rooting loaches can sift and forage without scratching their barbels or delicate scaleless skin. Avoid sharp or coarse substrate entirely.
Equipment & setup
Clown loaches grow large (8-12 inches) and need a 100+ gallon tank with very strong filtration (canister-grade) and high oxygenation, kept at 78-86F. Provide plenty of caves, PVC pipes, and driftwood clusters for hiding, since they are social and seek tight retreats during the day.
Diet
Omnivorous foragers that eat sinking pellets and wafers, frozen and live foods (bloodworms, brine shrimp), blanched vegetables, and notably snails, which they hunt readily. Offer a varied diet with both meaty and plant components to keep them in good condition and color.
Feed once or twice daily, using sinking foods so these bottom-oriented fish get their share. They have hearty appetites as they grow. A varied, well-rounded diet supports their long-term health, immunity, and the rich coloration the species is prized for.
Behavior & temperament
Active, intelligent, and highly social, clown loaches form hierarchies and are most confident and playful in groups of five or more, where they pile together, follow each other, and explore constantly. They sometimes rest on their sides (alarming to new keepers but normal), produce audible clicking sounds, and can be boisterous, so pair them with similarly sturdy, non-timid tankmates.
Enrich with caves, tunnels, driftwood, and open swimming space; a well-decorated tank with a strong group brings out their natural curiosity and antics. They are long-term companions that recognize feeding routines. Avoid keeping them with very small or delicate fish that could be stressed by their energy.
Health
Clown loaches are scaleless and famously prone to ich (white spot), often being the first fish in a tank to show it; they are sensitive to copper and full-strength medications, so treat with heat and reduced-dose protocols. Maintain warm, pristine, stable water to prevent outbreaks.
Stress from being kept singly, in small tanks, or in immature aquariums leads to disease and poor growth. Their decades-long lifespan and large adult size make impulse purchases a frequent welfare problem. Quarantine new fish, keep strong groups in large tanks, and provide excellent water quality to keep them healthy for the long haul.
Tips, DIY & hacks
Keep a minimum of 5-6 together; lone or paired clowns become stressed and prone to ich. Because they are scaleless and ich-prone, dose medications at half strength and quarantine new arrivals carefully; cut PVC elbows make cheap, secure group hides.