Cardinal Tetra (Paracheirodon axelrodi) Wild Rio Negro – Group of 10 Fish


One of the most popular and instantly recognizable freshwater aquarium fish, the Cardinal Tetra originates from the dark, acidic waters of the Negro and Orinoco River basins in Brazil, Colombia, and Venezuela. With their vivid red and blue coloration, peaceful demeanor, and schooling behavior they are one of the best aquarium fish species in the hobby for beginners and experienced hobbyists alike. Best kept in groups of 10 or more fish, they will get along with most other peaceful tankmates and will thrive in most setups. Wild cardinals collected from the middle Rio Negro in Brazil help support the sustainable aquarium fishery in the region which has been the focus of Project Piaba for over 25 years. For more information on this fishery and how it supports habitat preservation, visit



Cardinal Tetra (Paracheirodon axelrodi) Wild Rio Negro – Group of 10 Fish

Origin: Wild Brazil
Locale: Middle Rio Negro outside Barcelos
Diet: Omnivore and micropredator, will accept most prepared or frozen feeds in the aquarium
Adult Size: 2″
Recommended Tank Size: 20 gallons
Compatibility: A peaceful, schooling fish ideal for most community tanks

Preferred Water Parameters
pH:                          6.0 – 7.2
Temp:                     76-82F
Ammonia:              0ppm
Nitrite:                    0ppm
Nitrate:                  <30ppm

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