Otocinclus Care Guide
Otocinclus spp.
Use a sharp, accurately identified Otocinclus photo in a natural freshwater aquarium setting.
Key Takeaways
- Otocinclus needs at least 10 gallons, with 20 gallons preferred.
- Keep water between 22-26°C and pH 6-7.5.
- Keep a group of at least 6 to reduce stress.
Quick Facts
Care Overview
Otocinclus are small, peaceful algae eaters that are excellent for planted tanks. They are sensitive and should only be added to established, cycled tanks.
Ideal Tank Setup
Show the recommended 10+ gallon setup, substrate, hiding spots, and swimming area for Otocinclus.
A 10+ gallon established, planted tank with stable water parameters. They need algae to graze on. Keep in groups of 6 or more.
Diet and Feeding
Primarily algae eaters. Supplement with algae wafers and blanched vegetables. They need a constant food source and should not be added to new tanks.
Best Tank Mates
- Tetras
- Rasboras
- Corydoras
- Shrimp
Fish to Avoid
- Aggressive fish
- Large fish
Common Problems
- Starving in clean tanks
- Dying in new tanks
- Sensitivity to water changes
Common Beginner Mistakes
- Using a tank smaller than 10 gallons, which makes water quality harder to keep stable.
- Ignoring adult size, group size, or temperament when choosing tank mates.
- Changing too much water or filter media at once before checking ammonia and nitrite.
Frequently Asked Questions
Why do otocinclus keep dying?
They are sensitive fish that need established tanks with algae. Common causes include: new tank, no algae to eat, poor water quality, or being added before the tank is fully cycled.
Related Tools
Sources and Review Process
- Freshwater aquarium husbandry references for water quality, tank size, and stocking guidance.
- Species profiles and compatibility rules maintained in the TankWise data set.
- Aquarium health guidance is educational and should not replace an aquatic veterinarian for severe symptoms.
More Otocinclus Guides
Otocinclus often refuse food or starve in new, very clean tanks without enough algae and biofilm. They need mature tanks and supplemental food.
Compatibility verdict: good (92/100).
Compatibility verdict: good (95/100).
Algae growth is normal but excessive algae indicates an imbalance of light, nutrients, or CO2.