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The emperor tetra is a placid aquarium fish and will be disturbed by more boisterous species. It grows to 4.2 cm. [3] It prefers a pH of 6.5, a hardness of 3–6 dKH and a temperature of 23–27 °C. It does not school as readily as most tetras, and a pair appears happier than with most tetras.
The Tetra group employs over 700 colleagues, has representatives in more than 90 countries worldwide and is the largest manufacturer of aquaristic and pond products in the world. Apart from pet food, Tetra supplies fish keepers and pond owners with other products such as water conditioners , plant conditioners , technical equipment and ...
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A shoal of neon tetras in a home aquarium. In the wild they inhabit very soft, acidic waters (pH 4.0 to 4.8) [16] Ideal pH for aquarium is 7.0, but a range of 6.0 to 8.0 is tolerable. [17] They can have a lifespan of as long as ten years, [18] but normally just two to three years in an aquarium. [19]
The black tetra is also known as the black skirt tetra. The female black tetra is more robust and larger than the male. [29] Black morpho tetra: Poecilocharax weitzmani: 4 cm (1.6 in) Bleeding heart tetra: Hyphessobrycon erythrostigma: 6.5 cm (2.6 in) The bleeding heart tetra is distinguished by the small red spot on both sides of the fish.
Many ornamental freshwater aquarium fish, including the cardinal tetra and the discus (Symphysodon ssp.), are sourced from the Amazon River Basin area. [1] The Rio Negro region is the home of more than 100 different species of fish that are important to the pet fish trade. [4]
Some of these fish, like many of their relatives, are kept as aquarium pets and known collectively as tetras. With around 150 described species and new ones being described yearly, [ 2 ] this genus is among the largest of the entire order; Hyphessobrycon also has more than 145 species and which one is larger at any one time depends on whether ...
The black neon tetra (Hyphessobrycon herbertaxelrodi) is a freshwater fish of the characin family of the order Characiformes. It is native to the Paraguay basin of southern Brazil . They are often found in the aquarium trade.