Otocinclus Catfish

Out of stock
Aquatic Fish
17.95 AUD

✅ Otocinclus Catfish or Otocinclus Arnoldi may be the best scavengers that exist for freshwater aquariums! These little guys eat algae just like our Siamese Algae Eaters, so both are very popular for tackling an annoying algae problem before it gets out of control.

✅ The Otocinclus Arnoldi is a small freshwater fish that can grow about 3 – 4.5cm when fully mature. These quick and agile swimmers can dart from one end of the tank to another in an instant, making them ideal for smaller aquariums or tanks with slower moving inhabitants.

Otocinclus Aquarium

- You’ll need an aquarium filter capable of cycling at least four times per hour (GPH) and with mature nitrate levels between 0-20ppm

- No measurable ammonia or nitrite should be present either. 

- Otos prefer water with a stable pH that is slightly acidic (6-7.5). 

- The temperature inside their tanks should average about 22°C – 28°C degrees Celcius, allowing them to thrive year round without sustaining damage from changes in heat level outside. 

✅ Size: from 4cm

Limited Quantity Available - Will Sell out Fast!

We can’t ship Livestock and Live Plants to WA and TAS due to State Restrictions. Kindly check out our DOA and other policies before purchase!!

What to Expect from Us
All Aquatic plants and animals come with a 100% live arrival guarantee!!


Customer Reviews

Based on 1 review
Stephen Blevin
Beautiful Tankmates.

All arrived through the post fit and very healthy thank you! These are beautiful and peaceful catfish, not EVER to be confused with the eventually murderous 'sucking catfish'. The Otos are peaceful and graceful little fish. They nibble away at algae, but don't bother the desirable plants. Try to keep them as a small school if possible as they often like to 'hang out' together :)

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Otocinclus Catfish
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