Cardinal tetra

Like a neon with red running the full length. Prefers soft, warm water.

Cardinal tetra, side view

Care at a glance

Minimum tank20 gallons (76 L)
Temperature73–84°F (23–29°C)
pH5.0–7.0
How manyKeep at least 6 together
Adult size2 in (5.1 cm)
TemperamentPeaceful
Where it livesThe middle of the tank
TypeFish

Tanks that include cardinal tetras

Each one opens in the planner and passes every check.

Good tank mates

Possible with care

Do not mix with

Open any pairing to see the reason.

Tank sizes that fit