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✅ The Cardinal Tetra (Paracheirodon axelrodi) is a stunning and popular freshwater fish known for its vibrant colors and schooling behavior. Native to the upper Orinoco and Negro Rivers in South America, these tetras have become a favorite among aquarium enthusiasts
✅ The Cardinal Tetra is similar in appearance to the more common Neon Tetra (Paracheirodon innesi) but is distinguishable by its larger size and more vibrant coloration. They have a distinctive red stripe running horizontally along the lower half of their body, from the nose to the base of the tail, with a contrasting iridescent blue stripe above
✅ Cardinals are relatively small fish, reaching around 1.5 to 2 inches (3.8 to 5 centimeters) in length
✅ Cardinal Tetras are known for their strong schooling instincts. Keeping them in groups of six or more is essential to make them feel secure and to display their natural behaviors. In a well-planted aquarium, a school of Cardinal Tetras creates a stunning visual display as they swim together.
✅ Provide a well-planted tank with areas for swimming and hiding. They appreciate subdued lighting to mimic their natural habitat. Cardinals prefer slightly acidic to neutral water conditions. Maintain a temperature range between 73-81°F (23-27°C) and a pH level around 5.5-7.0
✅ Cardinal Tetras are omnivores. They accept high-quality flake or pellet food, but their diet should be supplemented with small live or frozen foods like brine shrimp, daphnia, and micro worms to enhance their coloration
✅ Cardinals are peaceful and generally get along well with other non-aggressive fish species. Suitable tankmates include other small tetras, rasboras, peaceful barbs, and small catfish. Avoid aggressive or fin-nipping tankmates, as Cardinals have delicate fins
✅ Breeding Cardinal Tetras in captivity can be challenging due to their specific requirements. They are egg scatterers, and soft, acidic water with gentle filtration and a separate breeding tank are often recommended
✅ Omnivorous. Will easily accept high quality dry and frozen foods. Social behavior: Peaceful, schooling/shoaling. Origin: Tank-bred, but indigenous to South America
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