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Product Details


3cm - 4cm

Care Level




Water Conditions

"Discover Otocinclus, the small and peaceful algae-eating fish! Learn about their care, tank mates, and beneficial role in the aquarium."

Detailed Description:

Otocinclus, commonly known as Otos or Otto Cats, are small freshwater fish renowned for their algae-eating abilities and peaceful nature. These delightful fish are popular among aquarium enthusiasts for their beneficial role in maintaining a clean and healthy tank. In this detailed description, we will explore the care requirements, ideal tank setup, suitable tank mates, and other important aspects of keeping and enjoying Otocinclus in your aquarium.


  • Small and Slender: Otocinclus are small fish that typically grow to around 1.5 to 2.5 inches (4 to 6 cm) in length. Their slender body shape and sucker mouth make them highly efficient at algae consumption.
  • Olive to Gray Coloration: Otos usually exhibit an olive to gray coloration, which allows them to blend seamlessly into their surroundings.

Water Conditions:

  • Temperature: Maintain the water temperature between 72°F and 78°F (22°C - 26°C) to provide the optimal conditions for Otocinclus.
  • pH Level: Aim for a slightly acidic to neutral pH level ranging from 6.5 to 7.5.
  • Water Hardness: These fish prefer moderately soft to moderately hard water, with a hardness level ranging from 2 to 15 dGH.
  • Filtration and Aeration: Provide gentle filtration and moderate water movement to ensure adequate oxygenation.

Tank Setup:

  • Tank Size: Otocinclus can be kept in small to medium-sized aquariums, with a minimum tank size of 10 gallons (38 liters) for a small group of Otos.
  • Aquascape: Create a well-planted aquarium with plenty of hiding spots and driftwood. Incorporate smooth rocks and surfaces to encourage algae growth for their consumption.
  • Substrate: Use fine gravel or sand as the substrate, as Otos enjoy foraging through the substrate in search of food.
  • Lighting: Moderate lighting is recommended to provide a natural day-night cycle and promote the growth of beneficial algae.

Tank Mates:

  • Peaceful Community Fish: Otocinclus are peaceful and compatible with a wide range of community fish, including small tetras, rasboras, gouramis, and other non-aggressive species that occupy different levels of the tank.
  • Avoid Aggressive Species: Keep Otos away from aggressive or fin-nipping fish that may harass or stress them.

Feeding Habit:

  • Algae and Vegetable Matter: Otocinclus are primarily herbivores and thrive on a diet rich in algae. However, they may also accept high-quality vegetable-based sinking pellets, blanched vegetables (such as zucchini or cucumber), and frozen or live foods like brine shrimp and daphnia.
  • Supplemental Feeding: If the aquarium does not provide sufficient algae, supplement their diet with commercial algae wafers or spirulina-based foods.


  • Water Maintenance: Perform regular partial water changes of 25% every week to maintain excellent water quality and remove any accumulated waste.
  • Observation and Health: Monitor the overall health and behavior of Otocinclus regularly. Look for signs of appetite, active swimming, and vibrant coloration. Ensure they have access to enough algae or supplemental food.

Otocinclus, with their small size and algae-eating habits, are a valuable addition to any aquarium. By providing them with the proper care, a suitable tank setup, and compatible tank mates, you can enjoy the benefits of their natural algae control while admiring their charming behavior and contribution to a healthy aquatic ecosystem.


SGD 2.06

Product Options

1 piece


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