The Cardinal Tetra is known for its vibrant color and adds a beautiful touch to any aquarium. Discover how to properly care for these stunning fish to help them thrive in their new home.

Overview

The scientific name for Cardinal Tetras is Paracheirodon axelrodi, growing up to 2 inches in size and have a lifespan of about 4 years. With a peaceful temperament, they are suitable for community tanks, making them a popular choice among aquarists. However, their care level is considered intermediate, requiring some attention to detail.

Habitat and Tank Requirements

Cardinal Tetras originate from South American rivers such as the Orinoco, Rio Negro, and Amazon. To replicate their natural habitat, it is recommended to house them in a tank of at least 20 gallons. Maintaining specific water parameters is crucial for their well-being:

• pH: 4.6–7.4
• Temperature: 73–81°F (23–27°C)

Provide subdued lighting in the tank along with floating plants for shade. Create a well-planted environment with open swimming areas to mimic their natural surroundings.

Diet

As omnivorous fish, Cardinal Tetras require a balanced diet for optimal health. Feed them high-quality flake food as the primary source (about 75% of their diet) and supplement with live or frozen food. It is recommended to feed them small amounts several times daily to prevent overfeeding and maintain water quality.

Behavior and Tankmates

Cardinal Tetras are social schooling fish, so it is best to keep them in groups of at least 6 individuals. They feel more secure and exhibit their natural behaviors when in a school. When selecting tankmates, choose peaceful species that won't harass or outcompete the Tetras for food. Full-grown cardinal tetras are less likely to be seen as prey by larger fish, reducing the risk of them becoming a eye delicious snack.