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The cardinal tetra is a very popular aquarium fish, ... The fish perished at a low temperature of 19.6 °C (67.3 °F) and a high of 33.7 °C (92.7 °F), ...
The water should be soft to slightly hard, d°GH of 6° to 15°, with a slightly acidic pH of 6.8, in the range 6.0 – 7.5. It prefers a temperature of 25 °C (77 °F) in the range 22–28 °C (72–82 °F). The hardiness of this fish allows it easily to adapt to harder water, though soft water is essential for captive breeding.
The rummy-nose tetra ... the temperature range for maintenance being 24 to 31 °C (75 to 88 °F), with the fishes sometimes requiring temperatures as high as 33 °C ...
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
Neon tetras are considered easy to keep in an aquarium of at least 10 US gallons (38 L; 8.3 imp gal) with a temperature range of between 72–76 °F (22–24 °C), a water pH of between 6.0 and 7.0, GH of below 10 dGH and KH of 1–2 dKH, and under 20 ppm of nitrate. [20]
The lack of sunlight would cause global temperatures to drop rapidly by as much as 7.2 degrees Fahrenheit (4 degrees Celsius). And as global temperatures plummeted, rainfall could drop by as much ...
Range Paracheirodon axelrodi (L. P. Schultz, 1956) Cardinal tetra Upper Orinoco and Negro River basins. [2] Paracheirodon innesi (G. S. Myers, 1936) Neon tetra Blackwater and clearwater stream tributaries of the Solimões River. [3] Paracheirodon simulans (Géry, 1963) Green neon tetra Upper Orinoco and Negro River basins. [4]
A Green neon tetra with the lack of red stripe clearly visible This fish loses its brilliant blue and red colors when lights are switched off, but regains them when lights are switched on again. The green neon tetra comes from extremely soft, acidic water at temperatures around 24 to 29 °C (75 to 84 °F).