AquaStocker

Corydoras Catfish Care Guide

Corydoras spp. · Easy care · 20 gallon minimum

Updated June 2026
By the AquaStocker team · How we source our data
Corydoras Catfish (Corydoras spp.)
Photo via Wikimedia Commons 📌 Save

Charming bottom-dwelling catfish that work the substrate in groups. Need smooth sand and friends.

Adult size2.5"
Min tank20 gal
Temp72–78°F
pH6.5–7.8
TemperamentPeaceful
SocialGroups of 6+
Care levelEasy
DietOmnivore

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How big does a corydoras catfish get?

A corydoras catfish (Corydoras spp.) reaches about 2.5 inches as an adult. Plan tank size and tank mates around the adult size, not the small fish you buy at the store.

Tank size & setup

Give a corydoras catfish a minimum of 20 gallons, with water at 72–78°F and a pH of 6.5–7.8. Keep them in groups of at least 6 — they are shoaling fish and become stressed and washed-out alone. As a easy-care, omnivore species, a stable, cycled tank with the right diet keeps them healthiest.

Good tank mates

Pair a corydoras catfish with peaceful species that share its temperature and pH range. Compatible options include:

About the corydoras catfish

Corydoras is a genus of freshwater ray-finned fish belonging to the family Callichthyidae, commonly referred to as the armoured catfishes, and the subfamily Corydoradinae, the corys. The species usually have more restricted areas of endemism than other callichthyids, but the area of distribution of the entire genus almost equals the area of distribution of the family, except for Panama where Corydoras is not present. Corydoras species are distributed in South America where they can be found from the east of the Andes to the Atlantic coast, from Trinidad to the Río de la Plata drainage in northern Argentina.

Recommended gear for corydoras catfishs

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FAQ

What size tank does a corydoras catfish need?
At least 20 gallons. Because they shoal, budget for a group of 6+ rather than a single fish. Bigger is always more forgiving for water quality.
Is the corydoras catfish good for beginners?
Yes — it's a easy-care species that tolerates typical community conditions.

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