Paracheirodon axelrodi (Cardinal Tetra)
Photo by Axel Rouvin 
Family: Characidae
Scientific name: Paracheirodon axelrodi
Common name: Cardinal Tetra
Synonyms: Cheirodon axelrodi, Hyphessobrycon cardinalis
Origin: South America; Brazil, Colombia and Venezuela, Orinoco, Rio Vaupes, Rio Negro. Slow flowing water.
Adult size: 5cm
Lifespan: 5 years
Sex: Females are rounder than males.
Minimum aquarium size: 60cm
Aquarium decor: A well planted tank with a dark background shows tetras at their best.
Temperature: 23-27°C
Water chemistry: pH 4-6. Hardness up to 4°dGH
Diet: Carnivore; live, flake
Swimming level: Bottom, middle.
Compatibility: Peaceful schooling fish best kept in groups of ten or more.
Comments: Wild caught Cardinal Tetras need soft acidic water. Aquarium bred fish can be acclimatised to cope with harder water.
