Otocinclus Catfish – Algae Eater 3cm
Otocinclus Catfish – Algae Eater 3cm
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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
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Lovely Otos arrived safe and healthy. They settled in quickly and are delightful.
All Otto's arrived in great shape and where shipped and delivered fast.
Very healthily fish I have bought other fish from you and am always delighted with how healthy they are. They settle in quick. Will buy from you again
Grabbed a good group of these guys and they are doing brilliant. Otos can sometimes be a bit sensitive with shipping, but every single one arrived healthy, and active. Awesome quality stock!!.
Ordered 10 and requested a bag of 6 and a bag of 4 because a mate and I were splitting the group between us. Fish arrived in tippy top condition. Will definitely buy more once back in stock.
Arrived healthy, went to work straight away and growing really fast!
Healthy fish, would recommend :)
All fish were healthy and the price was unbeatable. I haven’t seen ottos that price anywhere for many years
Beautiful and healthy otos!
My Otos arrived in great condition and settled into the tank super quickly. They started eating blanched veggies almost straight away and are looking very healthy 2 weeks after delivery, with no deaths. The pricing was very competitive, much cheaper than most stores near me, even after including the shipping cost. Would definitely order again!