Cardinal Tetras vs Neon Tetras: Differences, Similarities, and Care Tips

Cardinal tetras (Paracheirodon axelrodi) and neon tetras (Paracheirodon innesi) are both popular choices among fishkeepers due to their small size, colorful appearance, and peaceful nature. However, there are some differences between the two species that are important to consider when deciding which one is right for your aquarium.

In this article, we'll take a closer look at the differences and similarities between cardinal tetras and neon tetras, as well as provide some care tips to help you keep these beautiful fish healthy and happy in your tank.

Cardinal Tetras

Cardinal tetras (Paracheirodon axelrodi) are small, colorful fish that are native to the tributaries of the Orinoco and Negro rivers in South America. They are known for their bright red coloration with a neon blue stripe running down their sides. Cardinal tetras are often confused with another species called the green neon tetra (Paracheirodon simulans), but they can be distinguished by the absence of a small black spot on the base of their tail fin, which green neon tetras have.

Neon Tetras

Neon tetras (Paracheirodon innesi) are small, colorful fish that are native to the upper Amazon Basin in South America. They are known for their bright blue coloration with a neon red stripe running down their sides. Neon tetras are often confused with another species called the black neon tetra (Hyphessobrycon herbertaxelrodi), but they can be distinguished by the absence of a small black spot on the base of their tail fin, which black neon tetras have.

Differences between Cardinal Tetras and Neon Tetras

One of the most obvious differences between these two species is their coloration. Cardinal tetras are known for their bright red coloration with a neon blue stripe running down their sides, while neon tetras are bright blue with a neon red stripe.

Another difference is their natural habitat. Cardinal tetras are native to the tributaries of the Orinoco and Negro rivers in South America, while neon tetras are native to the upper Amazon Basin.

In terms of size, neon tetras are slightly smaller than cardinal tetras, reaching a maximum size of about 1 inch (2.5 cm) compared to 1.5 inches (3.8 cm) for cardinal tetras.

Similarities between Cardinal Tetras and Neon Tetras

Despite their differences, cardinal tetras and neon tetras do have some similarities. Both species are peaceful and do well in a community tank with other small, peaceful fish. They are also both omnivores, meaning they will eat a variety of foods including flakes, pellets, frozen or live insects, and vegetables.

Both species also have similar care requirements, including a preference for a well-planted tank with a pH between 6.0 and 7.5 and a temperature between 73 and 81 degrees Fahrenheit (23-27 degrees Celsius). They also both prefer a tank with some hiding spots, such as caves or plants, and do well in schools of at least six individuals.

Care Tips for Cardinal Tetras and Neon Tetras

Here are some tips for keeping cardinal tetras and neon tetras healthy and happy in your tank:

• Provide a well-planted tank with a pH between 6.0 and 7.5 and a temperature between 73 and 81 degrees Fahrenheit (23-27 degrees Celsius).
• Keep the tank clean by performing regular water changes and using a high-quality filter.
• Feed a varied diet of flakes, pellets, frozen or live insects, and vegetables.
• Keep the fish in a school of at least six individuals to help reduce stress and promote healthy social behavior.
• Provide some hiding spots, such as caves or plants, to help the fish feel more secure.
• Avoid keeping these fish with larger or more aggressive species.

By following these care tips, you can help ensure that your cardinal tetras or neon tetras thrive in your aquarium. Whether you choose one species or both, these colorful and peaceful fish are sure to add beauty and interest to your tank.