Otocinclus Catfish

The Otocinclus Catfish, commonly called an Oto, is a small, peaceful freshwater algae eater and an excellent addition to planted and community aquariums. These hardworking little fish spend much of their time grazing on soft algae and biofilm from aquarium glass, plants, rocks and driftwood.

Otocinclus are gentle, active and completely non-aggressive. They do best in established aquariums with plenty of natural biofilm and should be kept in groups, where they feel more secure and display more natural behaviour.

Care Details

Adult Size: Approx. 1.5–2 inches

Minimum Tank Size: 10 gallons

Temperature: 22–26°C

Temperament: Peaceful

Social Grouping: Keep 4–6+ when possible

Diet: Algae, biofilm, algae wafers and blanched vegetables

Difficulty: Moderate

Best For: Planted tanks and peaceful community aquariums

🌿 Great natural algae grazer

🐟 Peaceful community fish

🌱 Plant-safe

🤝 Best kept in groups

Available from Ottawa Tropical Fish in Barrhaven, Ottawa.