Otocinclus Catfish

The Otocinclus Catfish (Otocinclus sp.), also known as the Oto Catfish, is a small, schooling species of catfish native to South America. These catfish are popular due to their algae-eating capabilities, as well as their small size.

Minimum Tank Size: 10 Gallons

Maximum Fish Size: 1.5 inches

Water Temperature: 72F to 82F

Ideal pH: 6.5 - 7.0

Water Hardness: 6 - 15 dGH

Temperament: Docile Schooling Species. Does best in groups of 6+. While these fish eat algae, their diet must be supplemented to prevent starvation. We recommend commercially-available algae wafers.

Unless experienced with fish-in cycling, we always suggest cycling an aquarium BEFORE adding fish. Adding fish to a fresh, un-cycled aquarium can kill them rapidly. We offer free water testing at our physical location, and advice via email or call.