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Otocinclus, also known as "otos" or "dwarf suckers," are small freshwater catfish native to South America. They are popular among aquarium enthusiasts for their ability to keep tanks clean by eating algae and other debris, as well as their peaceful temperament and interesting behavior.


Otocinclus thrive in a well-established aquarium with a planted environment and plenty of hiding places. They are social and should be kept in groups of at least 6 individuals. They are herbivores and should be provided with a varied diet that includes algae wafers, blanched vegetables, and live or frozen foods such as brine shrimp or bloodworms.


Otocinclus are small fish, typically growing to 1-2 inches in length. They have a streamlined body shape with a silver or olive-green coloration and a distinctive black line running from their eyes to their tail fin. They also have a sucker mouth and two pairs of barbels that they use to navigate and locate food.


Otocinclus are active and peaceful fish that spend most of their time scavenging for algae and other debris. They are known for their unique behavior of "resting" on the side of aquarium glass or plants, which is actually a way for them to take a break from swimming and conserve energy.


Water Parameters:

  • pH: 6.0-7.5
  • gH: 3-10
  • kH: 2-6
  • TDS: 100-300
  • Temperature: 72-78°F


Please note that these are general guidelines, and for more accurate values, we encourage you to contact Living Aquarium by phone or in person. Within store hours, our team of experts are always happy to answer any questions you may have and provide personalized guidance on care.

Otto Cats/ Catfish

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