Cardinal Tetra - Paracheirodon axelrodi

Cardinal Tetra (Paracheirodon axelrodi)

The Cardinal Tetra (Paracheirodon axelrodi) is a dazzling freshwater fish known for its vivid red and blue coloration. Highly prized in the aquarium hobby, this small, peaceful species is ideal for community tanks due to its vibrant appearance and active schooling behavior.

Description:

• Common Name: Cardinal Tetra

• Scientific Name: Paracheirodon axelrodi

• Family: Characidae

• Size: Up to 2.5 inches (6.5 cm)

• Color: Brilliant blue body with a prominent red stripe extending from the middle of the body to the base of the tail. The colors are intensified under proper lighting conditions.

Native Region:

The Cardinal Tetra is native to the Rio Orinoco and Rio Negro river systems in Venezuela and Brazil. These regions feature slow-moving, blackwater rivers with soft, acidic conditions and dense aquatic vegetation.

Aquarium Setup:

• Tank Size: Minimum of 20 gallons (75 liters) for a small school

• Water Parameters:

• Temperature: 73-81°F (23-27°C)

• pH: 4.6-6.2

• Hardness: Soft water (1-8 dGH)

• Substrate: Soft sand or fine gravel; a well-planted tank with plenty of hiding spots and open swimming areas

• Diet: Omnivorous; feed a varied diet of high-quality flakes, micro-pellets, and live or frozen foods such as brine shrimp, bloodworms, and daphnia

Care Level:

• Difficulty: Easy to moderate

• Temperament: Peaceful and social; best kept in schools of 10 or more to exhibit natural schooling behavior and reduce stress

• Lifespan: 3-5 years

• Breeding: Egg-layer; breeding in captivity can be challenging and usually requires a separate breeding tank with soft, acidic water and appropriate conditions for spawning

Additional Tips:

• Tank Mates: Ideal for community tanks with other small, peaceful species like tetras, rasboras, and dwarf cichlids. Avoid larger or more aggressive fish that may intimidate the tetras.

• Behavior: Cardinal Tetras are active and social, thriving in groups where they engage in natural schooling and foraging behaviors.

• Water Quality: Maintain excellent water quality with regular water changes and effective filtration to keep the fish healthy and vibrant.