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Clown Loach
Chromobotia macracanthus
Animalia›Chordata›Actinopterygii›Botiidae
📍 Sumatra & Borneo, Indonesia
Clown loaches are sociable, active fish with bold orange and black banding. They grow large over time and need spacious tanks with plenty of hiding spots. They are excellent snail hunters and enjoy digging in soft substrate.
Care Guide
Diet
Clown loaches are omnivores that require a varied diet of sinking pellets, frozen bloodworms, and occasional live snails to satisfy their natural foraging behavior. Feed high-quality sinking pellets as a staple 5-6 days per week, supplemented with blanched vegetables like zucchini and cucumber 2-3 times weekly. They are excellent snail hunters and will actively consume pest snails, making them valuable for biocontrol in planted tanks.
Behavior
Clown loaches are highly social and active fish that must be kept in groups of at least 5 individuals to prevent stress and aggression. They are bottom-dwellers that spend much of their time digging, sifting, and exploring the substrate, and they often hide in caves or dense vegetation during the day. They are peaceful with other fish but may harass smaller shrimp or snails; they are most active during dawn and dusk.
Breeding
Breeding clown loaches in captivity is extremely difficult and rarely successful in home aquariums. They require specific environmental triggers (seasonal temperature changes, water chemistry shifts) and large spawning spaces that are difficult to replicate. Most clown loaches in the hobby are wild-caught or commercially bred in specialized facilities.
Tank Mates
Non-aggressive bottom feeder with compatible water parameters and nocturnal activity patterns
Compatible loach species with similar social and environmental needs; may compete for food
Peaceful mid-water schooling fish that won't compete with bottom-dwelling loaches
Small, peaceful schooling fish that occupy different water zones and have compatible temperature needs
May be hunted by clown loaches; only suitable in heavily planted tanks with plenty of hiding spots
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, flashing against objects, rapid breathing, lethargy
Raise temperature gradually to 28-30°C, perform daily 25% water changes, use aquarium salt (1 tsp per 5 gallons) or ich medication; treat for 10-14 days
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy, loss of appetite
Improve water quality with frequent partial water changes, maintain optimal temperature and pH, use antibacterial medication if severe; remove sharp decorations
Bacterial Infection
Open sores, red streaks on body, swollen areas, cloudy eyes, loss of appetite
Perform 50% water change immediately, maintain pristine water conditions, use broad-spectrum antibiotic medication; isolate severely affected fish if possible
Parasitic Infection (Flukes/Worms)
Excessive scratching on substrate and objects, clamped fins, visible parasites, weight loss despite feeding
Use anti-parasitic medication designed for loaches, perform frequent water changes, quarantine new fish before adding to main tank
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Quick Facts
- diet
- Omnivore – sinking pellets, snails, bloodworms, vegetables
- lifespan
- 10–20+ years
- max size
- 30 cm (12 in)
- tank size
- 75 gallons minimum (adults)
- temperament
- Peaceful, social; keep in groups of 5+
Water it likes
- ph
- 6.0–7.5
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 5–12 dGH
- temperature
- 77–86°F (25–30°C)