Otocinclus

Otocinclus Catfish (Otocinclus spp.)

Nature’s Gentle Algae Eater – Perfect for Planted Tanks

Introduce a natural and peaceful cleaning crew to your freshwater aquarium with the Otocinclus Catfish. These small, hardworking algae grazers are beloved for their calm temperament, schooling behavior, and ability to keep plant leaves clean without harming them. Ideal for nano and community tanks, Otos are best kept in groups and thrive in well-maintained, mature aquariums.

Species Overview

Common Name: Otocinclus, Oto Catfish, Dwarf Sucker

Scientific Name: Otocinclus spp. (often O. affinis or O. macrospilus)

Origin: South America

Size: 1.5–2 inches (3.8–5 cm)

Lifespan: 3–5 years

Temperament: Peaceful, social, and shy

Water Parameters

Temperature: 72–79°F (22–26°C)

pH: 6.0–7.5

Hardness: 5–15 dGH

Minimum Tank Size: 10 gallons (ideal in planted tanks with hiding spots)

Diet and Feeding

Otocinclus are primarily herbivores and should be provided with:

Natural algae growth on surfaces and plants

Algae wafers or sinking spirulina pellets

Blanched vegetables such as zucchini or spinach (remove after 24 hours)

Supplemental feeding is important if natural algae is limited

Care Tips

Keep in groups of four or more to reduce stress

Require a mature, stable tank with excellent water quality

Sensitive to poor water conditions and sudden fluctuations

Provide gentle water flow and plenty of live plants for security

Compatibility

Otocinclus are ideal for peaceful community tanks and do well with:

Tetras, Rasboras, Corydoras

Dwarf Gouramis, Apistogrammas

Shrimp and snails

Avoid aggressive or large predatory fish

Why Choose Otocinclus?

They are a low-maintenance, peaceful, and eco-friendly addition to your planted aquarium, helping control algae naturally while adding movement and life to your tank.