Can Glass Catfish and Otocinclus Live Together?
Yes, Glass Catfish and Otocinclus are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 132 litres is recommended.
At a Glance
Behaviour & Temperament
Glass Catfish is a peaceful species (1/10), while Otocinclus is peaceful (0/10). This modest difference means Glass Catfish may occasionally assert dominance over Otocinclus.
Glass Catfish and Otocinclus both frequent the Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Water Parameters
The safe temperature window for both species falls between 24°C and 26°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
Both fish can tolerate a pH between 6 and 7. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 4–10 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Glass Catfish and Otocinclus together, plan for an aquarium of at least 132 litres with a minimum length of 90 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.
Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.
Specific environmental needs for this combination include: Plants - Densely covered, Plants - Floating, Established Algae (Otocinclus), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding). Meeting these requirements will help both species thrive.
Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.
Frequently Asked Questions
Can Glass Catfish and Otocinclus live together?▾
Yes. Glass Catfish and Otocinclus are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.
What size tank do Glass Catfish and Otocinclus need?▾
A minimum of 132 litres (tank length at least 90 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.
What water temperature is best for Glass Catfish and Otocinclus together?▾
Keep the aquarium between 24°C and 26°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Glass Catfish or Otocinclus aggressive?▾
Glass Catfish is peaceful (1/10) and Otocinclus is peaceful (0/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Glass Catfish and Otocinclus need?▾
Both species overlap in the 6–7 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
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