Otocinclus Catfish 3cm

The Otocinclus Catfish (Otocinclus sp.) is one of the most popular and effective algae-eating fish in the planted aquarium hobby, originating from South America. These small, peaceful catfish are tireless grazers of soft green algae and biofilm, making them an invaluable addition to planted tanks where they work quietly and efficiently without disturbing plants or tankmates. Best kept in groups, they are social fish that thrive when not kept alone.

Care Guide

• Tank Size: Minimum 40L; best kept in groups of 6 or more
• Water Parameters: pH 6.0–7.5 | Temp 22–27°C | Soft to moderately hard water
• Diet: Herbivorous — soft green algae and biofilm; supplement with algae wafers, blanched zucchini, spinach, and cucumber
• Temperament: Peaceful; excellent community fish — safe with all plants and invertebrates
• Tank Setup: Planted aquarium with smooth surfaces, driftwood, and gentle flow; avoid strong currents
• Skill Level: Beginner to Intermediate (sensitive to poor water quality)
• Max Size: 4cm