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For those seeking to breed them in the aquarium, the best way to do so is by mimicking the same natural setup. A study conducted in Manaus, Brazil, subjected cardinal tetras to adverse water conditions for 96 hours. The fish perished at a low temperature of 19.6 °C (67.3 °F) and a high of 33.7 °C (92.7 °F), and pH below 2.9 or above 8.8. [5]
Vietnamese cardinal minnows do best in a water temperature ranging from 19–23 degrees Celsius. Softer water within the range of 37–142 ppm is also preferable. They are peaceful, though males constantly challenge one another, harmlessly, and do well with a variety of fish, such as cyprinids, catfish, loaches, and tetras.
The neon tetra has a light-blue back over a silver-white abdomen. The fish is characterized by an iridescent blue horizontal stripe along each side of the fish from its nose to the base of the adipose fin, and an iridescent red stripe that begins at the middle of the body and extends posteriorly to the base of the caudal fin. The fish is ...
Although the nominal temperature range for the species in the wild is 18–22 °C (64–72 °F), it can survive water temperatures down to 5 °C (41 °F). [7] This makes it an ideal fish for keeping in an unheated aquarium in cold climates.
Similar to Neon Tetras and Cardinal Tetras, they are the same to Neon Tetras beside having a green tiny near their top dorsal fin [35] Head and tail light tetra: Hemigrammus ocellifer: 4 cm (1.6 in) Hummingbird tetra: Trochilocharax ornatus: 2 cm (0.79 in) January tetra: Hemigrammus hyanuary: 4 cm (1.6 in) Lemon tetra: Hyphessobrycon pulchripinnis
Hemigrammus erythrozonus, commonly known as the glowlight tetra, is a small tropical fish from the Essequibo River, Guyana, South America.It is silver in colour and a bright iridescent orange to red stripe extends from the snout to the base of its tail, the front of the dorsal fin being the same color as the stripe.
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The fish are also not caught by fish farmers during their breeding season. [9] The cardinal tetra, especially, is considered a renewable resource. [10] Project Piaba assesses the sustainability of the species farmed in the Rio Negro area by using the "F value" which estimates the portion of the catch from the total biomass. [11]