Corydoras care guide

Tank size and group

Corydoras are schooling fish; keep at least five or six together. They need a tank of 20 gallons or more for a group. Use soft substrate (sand or fine gravel) so they don’t damage their barbels. Heater and filter required; keep ammonia and nitrite at zero. See water parameters and cycling.

Feeding and tank mates

They eat sinking pellets, wafers, and occasional frozen or live food. Feed after lights-out if needed so other fish don’t get it all. Peaceful with most community fish: tetras, rasboras, guppies, bettas (in a roomy tank). Track your tank with App-aquatic.

Quick takeaways

• Group of five or more; 20+ gallons; soft substrate.
• Sinking food; peaceful with community fish.