Latin Name: Paracheirodon axelrodi

Other Names: None

How hard are they to keep? Cardinal Tetras are considered relatively easy to keep, making them suitable for beginner aquarists. However, they require specific water conditions to thrive.

What is its maximum size? Cardinal Tetras typically grow to a maximum length of around 1.5 to 2 inches (3.8 to 5 cm).

Where are they from? Cardinal Tetras are native to the upper Orinoco and Negro River basins in South America, specifically in Venezuela, Colombia, and Brazil.

How many can I keep? They are schooling fish and should be kept in groups of at least 6 or more individuals to provide a sense of security and reduce stress.

How compatible are they with other fish? Cardinal Tetras are generally peaceful and can be kept with other small, non-aggressive fish. They are often recommended as suitable tankmates for other peaceful tetra species.

What are the ideal water conditions? They thrive in soft, acidic water conditions, with a pH range of 4.6-6.2. The temperature should be maintained between 75-82°F (24-28°C). Adding tannins (such as from Indian almond leaves) to the water can mimic their natural habitat and promote their well-being. The Cardinal Tetras that are for sale have been climatized to our local water conditions.

How do you tell the difference between male and female? It is challenging to differentiate between male and female Cardinal Tetras as they are similar in appearance and lack distinctive physical differences. Visual identification is generally not reliable.

Fun Fact: Cardinal Tetras are popular in the aquarium hobby for their stunning vibrant red and blue coloration. They have a striking horizontal stripe that extends through the entire length of their body, making them a visually appealing addition to community tanks. Their colors tend to intensify under optimal conditions, creating a beautiful display.