Native to the Orinoco river in South America, they can grow up to 1.25 in (3 cm) and have a striking iridescent blue line characteristic of the Paracheirodon species. Cardinal tetras have a lifespan of one year in the wild, but can live longer in captivity.
Often confused with their closely related neon tetras, they can be differentiated upon close inspection by the red stripe which, in neons extends only about halfway across their bodies.
The eggs of the cardinal tetra are photosensitive, and will die if exposed to bright light. Consequently, after spawning, the fish should be removed and the aquarium covered to darken it, thus providing the eggs with the necessary conditions for their development.
If the eggs are fertile and kept in darkened surroundings, they will hatch in approximately three days at 32°F (28°C). The fry remain photosensitive for at least the first seven days of life, and need to be introduced to increasing light levels on a gradual basis. During this time, they are approximately 4 mm in length, and require infusoria or liquid fry food.
Newly-hatched brine shrimp and other similar live foods such as sifted Daphnia can be fed to the growing babies after seven days from hatching.
Growth continues at a modest rate, and the fish assume full adult coloration only after a period of approximately 8 to 12 weeks.
Provide an environment that resembles their natural habitat, using fine-leaved plants such as Cabomba. Other plants such as Amazon Swordplants and Vallisneria are equally suitable for an aquarium housing the cardinal tetra.
(Source: Wikipedia – The Free Online Encyclopedia)
HABITAT: Bolivia and Brazil
Compatible: Tetras, Rasboras, Danios, Dwarf Gouramis, Livebearers, Corydoras, Discus, Angels, Barbs, Rainbowfish and small Plecos.
Aquarium Setup: 68-74°F; pH 5.0-7.0; dH 1.0-2.0
Size: 1 in (2.5 cm)
For detail information about Tetras refer to the articles below: