Guide
Corydoras care guide
Tank size, group size, substrate, feeding, and water parameters for these peaceful bottom dwellers.
- Group of five or more; 20+ gallons; soft substrate.
- Sinking food; peaceful with community fish.
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.
Keep learning
Stable aquariums come from consistent testing and patient stocking. Continue with our water parameters guide, how to cycle a tank, and combining fish safely. For logging and strip scans, see App-aquatic.
Log parameters, scan strips offline, and run stocking checks with App-aquatic.
Get the free appTank 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 .
How does regular testing help?
Regular testing lets you catch ammonia, nitrite, and nitrate shifts before fish show stress. Log results over time to see trends, not single snapshots.