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Otocinclus

Otocinclus vittatus

The finest algae-eating fish for planted tanks. Otocinclus are small, peaceful, and won't damage plants — unlike larger algae eaters. They're the gold standard for keeping glass and leaves spotlessly clean.

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Quick Facts

Max Size2"
Lifespan3–5 years
Min Tank10 gal
DietHerbivore
SchoolingYes (6+)
OriginSouth America

Water Parameters

Temperature2228°C
pH Range67.5

Natural Habitat

Shallow, clear streams with abundant algae growth on rocks, wood, and vegetation.

Region

Amazon & Paraguay basins

Countries

Brazil, Paraguay, Argentina

Feeding

Primarily algae — biofilm on glass, rocks, and leaves. Supplement with algae wafers, blanched zucchini, and spinach when tank algae is depleted.

Compatible Tank Mates

Good Matches

Any peaceful community fishShrimpCorydorasSmall TetrasRasboras

Avoid

Large or aggressive fishBare tanks with no algae or biofilm

Breeding

Difficult in captivity. Eggs are laid on plant leaves and glass. Requires pristine water and abundant biofilm.

Care Tips

Buy only from well-stocked, healthy tanks — they're fragile when stressed

Acclimate very slowly — drip acclimation recommended

Must have biofilm or algae to eat — don't add to brand new tanks

Groups of 6+ are essential — they're schooling fish

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