What size tank does a Otocinclus Catfish need?

Otocinclus Catfish needs a minimum of 10 gallons, with 20 gallons recommended. They are bottom swimmers. Keep in groups of 4+.

Is Otocinclus Catfish good for beginners?

Otocinclus Catfish is rated "intermediate" difficulty (2/5). Great for beginners.

What fish are compatible with Otocinclus Catfish?

Otocinclus Catfish is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6-7.5, temp 72-79°F).

Otocinclus Catfish

Otocinclus vittatus

Family: Loricariidae • Origin: South America

The Otocinclus is the best small algae eater for planted tanks. They stay tiny and won't damage plants.

Min Tank

10 gal

Max Size

Temperature

72-79°F

6-7.5

Lifespan

5 years

School Size

Swim Level

bottom

Hardness

2-15 dGH

peacefulintermediateherbivoreschooling

Is Otocinclus Catfish Right for Your Tank?

Otocinclus Catfish is an excellent choice for beginners — rated "intermediate" difficulty (2/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. At just 10 gallons minimum, they work well in nano tanks and smaller setups.

With a peaceful temperament, Otocinclus Catfish makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 4 together, or they may become stressed and display abnormal behavior. Expected lifespan: 5 years with proper care.

Common Mistakes with Otocinclus Catfish

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Keeping fewer than 4 together

Otocinclus Catfish is a schooling species — they need a group of at least 4 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Putting them in a tank under 10 gallons

While 10 gallons is the minimum, nano tanks require more frequent water changes and leave less room for error. A slightly larger tank (20 gal) is much more forgiving.