Cardinal Tetra

Overview

The Cardinal Tetra, scientifically known as Paracheirodon axelrodi, is a small freshwater fish native to the Amazon Basin in South America. Known for its striking coloration, this fish is a favorite among aquarists and is often found in community tanks. Their bright blue and red coloration makes them a standout in any aquarium setup.

Natural Habitat

Cardinal Tetras are typically found in the slow-moving waters of the Amazon River and its tributaries. They thrive in flooded tropical forests and prefer dimly lit environments with plenty of vegetation. The natural habitat provides them with plenty of cover and food sources, contributing to their peaceful nature.

Care Requirements

Cardinal Tetras are generally considered easy to care for, making them suitable for both beginner and experienced aquarists. Here are the key care requirements to keep them healthy:

Tank Setup

• Minimum tank size: 60 liters (15 gallons) is recommended for a small school.
• Water conditions should reflect their natural habitat: slightly acidic to neutral pH (around 6.0 to 7.0), soft to moderately hard water.
• Provide plenty of plants, driftwood, and hiding spots to mimic their natural environment and help reduce stress.
• Substrate can be fine gravel or sand, as this will be more comfortable for them.

Compatibility

Cardinal Tetras are known for their peaceful temperament and do well in community tanks. They can be housed with:

• Other small, peaceful fish like Neon Tetras, Rasboras, and some species of Gouramis.
• Avoid aggressive or larger species that might view them as prey.

Feeding

They are omnivorous and will accept a variety of foods. A balanced diet should include:

• High-quality flake or pellet food.
• Frozen or freeze-dried foods like bloodworms and brine shrimp.
• Supplement with vegetable matter, such as blanched lettuce or spirulina flakes.

Lighting and CO2

Moderate lighting is best for Cardinal Tetras, as they come from dimly lit habitats. They do not require high CO2 levels but will benefit from some CO2 injection if you have a heavily planted tank.

Specifications

• Maximum Size: Generally reaches about 4 cm in length.
• Lifespan: Typically 5 to 7 years with proper care.
• Swimming Level: They usually occupy the middle levels of the tank.
• Minimum Group Size: It is advisable to keep them in groups of at least 6 to maintain their natural schooling behavior.
• Temperament: Peaceful, suitable for community tanks.