Otocinclus Catfish

MACROTOCINCLUS AFFINIS (OTOCINCLUS CATFISH)

Macrotocinclus affinis (formerly Otocinclus affinis)

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📍 BASIC INFO

Origin: South America – Amazon & Southeastern Brazil

Adult Size: 1.5″ – 2″

Temperament: Peaceful

Care Level: ⭐ Moderate

Tank Level: Bottom – Glass & Plant Surfaces

🍽 DIET

Herbivore / Biofilm Grazer

Accepts: Natural algae, biofilm, algae wafers, spirulina foods, blanched vegetables

✔ COMPATIBILITY

Excellent nano community fish. Best kept in groups of 5 or more for security and natural behavior. Safe with shrimp, tetras, rasboras, and other peaceful species.

💧 WATER PARAMETERS

pH: 6.0 – 7.5

Temperature: 72–79°F

Ammonia: 0 ppm

Nitrite: 0 ppm

Nitrate: <20 ppm

⭐ HIGHLIGHT

Tiny peaceful algae-eater known for gentle behavior and constant grazing on glass and plants.

📝 CARE NOTES

Prefers mature, well-established aquariums with stable water conditions and natural algae growth. Sensitive to sudden parameter changes, so slow acclimation is recommended. Provide supplemental vegetable-based foods once natural algae becomes limited.

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