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Breeding the Black neon tetra requires acidic water with no more than four degrees of hardness. The black neon tetra is an egg scatterer, laying adhesive (sticky) eggs over plants, etc. [3] One female can produce several hundred eggs.
A neon tetra can appear slightly plump in the belly due to having overeaten. Neon tetras need dim lighting, a DH less than one, about 5.5 pH, and a temperature of 75 °F (24 °C) to breed. There also needs to be a lot of tannins in the water. Neon tetras are old enough to breed at 12 weeks. [23]
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.
Neon tetra: Paracheirodon innesi: 3.75 cm (1.48 in) Neon tetras must be kept in groups of at least a half-dozen, as they are a shoaling species. With peaceful dispositions, they are also able to be kept with other species of non-aggressive fish. [36] 38 L (10 gal) [36] 68 to 79 F (20 to 26 C) [36] 6.0–7.0 [37] Ornate tetra: Hyphessobrycon bentosi
During the 1940s and 1950s, White Cloud Mountain minnows acquired the nickname, the "Poor Man's Neon Tetra", because they were much more affordable in price than the colorful and then expensive neon tetras. [9] Two variants are commonly available: the "Golden Cloud" and the longer-finned "Meteor Minnow", which can be gold as well.
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).
The cardinal tetra is a very popular aquarium fish, but is less widespread than the neon tetra because until recently, it was difficult to breed in captivity. However, many breeders are now producing the fish; in most cases, one can determine if the cardinal tetra is bred or wild-caught due to damaged fins on wild-caught specimens.
Aquarists keep this fish in water ranging from 20 to 23 °C (68 to 73 °F) that is soft (50–100mg/L) and acidic (pH 6.5). [4] The H. sweglesi is reported to be very sensitive to water chemistry, which affects the fish's coloration. [4] Frequent water changes are advised for it to thrive and to induce it to breed. [4]