

The Otocinclus Catfish, affectionately known as "Otos," are diminutive freshwater fish celebrated for their exceptional algae-eating capabilities. Native to South America, these peaceful and social bottom-dwellers are ideal for maintaining a clean and balanced aquarium environment. At approximately 3cm in size, they are perfect for nano and community tanks, bringing both functionality and charm to your aquatic setup.
Scientific Name: Otocinclus spp.
Common Names: Otocinclus Catfish, Oto Cat, Dwarf Suckermouth
Size: Up to 5 cm (2 inches)
Lifespan: 3–5 years with proper care
Temperament: Peaceful and social; thrives in groups
Diet: Primarily herbivorous – consumes soft algae and biofilm; accepts algae wafers and blanched vegetables
Water Parameters:
Temperature: 22–26°C (72–79°F)
pH Level: 6.5–7.5
Hardness: 36–179 ppm
Minimum Tank Size: 20 liters (5 gallons).
Efficient Algae Eaters: Excellent at controlling soft algae growth on plants, glass, and decorations.
Ideal for Nano Tanks: Small size makes them perfect for compact aquarium setups.
Community-Friendly: Peaceful nature allows them to coexist with a variety of tank mates.
Low Bioload: Minimal waste production helps maintain water quality.
Substrate: Fine sand or smooth gravel to protect delicate barbels.
Decor: Incorporate live plants, driftwood, and smooth rocks to provide grazing surfaces and hiding spots.
Filtration: Gentle filtration with moderate water flow to mimic natural habitats.
Lighting: Moderate lighting to support plant growth and algae development.
Tank Cover: Secure lid recommended, as Otos may jump if startled.
Otocinclus Catfish are compatible with other peaceful species, such as:
Tetras
Corydoras Catfish
Avoid housing with aggressive or significantly larger fish that may cause stress or pose a threat.
Staple Diet: Soft algae and biofilm present in established aquariums.
Supplementary Foods: Algae wafers, spirulina tablets, and blanched vegetables like zucchini and spinach.
Feeding Frequency: Once daily; ensure food reaches the bottom where they naturally forage.
Are Otocinclus Catfish suitable for beginners?
Yes, they are hardy and low-maintenance, making them suitable for novice aquarists.
Can they be kept alone?
It's recommended to keep them in groups of at least 3 to promote natural behavior and reduce stress.
Do they require a heater?
Yes, maintaining a stable temperature between 22–26°C (72–79°F) is ideal.
Are they safe for planted tanks?
Absolutely; they are plant-friendly and help control algae on plant surfaces.
At Fish Hut Aqua, we don’t just sell fish—we’re passionate aquarists dedicated to helping you succeed.
Add the Otocinclus Catfish to your tank and enjoy a harmonious blend of beauty and utility. Order now from Fish Hut Aqua and experience the difference these gentle guardians can make in your aquatic world.
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