The Black Neon Tetra is a hardy schooling fish with a striking black stripe and iridescent greenish-white line, perfect for community tanks.
Overview
Hyphessobrycon herbertaxelrodi is a small characin from the family Characidae, widely known among aquarists as the Black Neon Tetra. In the wild, this species inhabits the Taquari River basin in Mato Grosso do Sul, Brazil, where it lives in shaded forest streams with soft, slightly acidic water.
The Black Neon Tetra reaches a size of 4-5 cm and features an elegant coloration: a broad black stripe runs along the body, with a bright iridescent greenish-white line above it. This striking contrast gives the fish its distinctive and recognizable appearance. The body is elongated and slightly laterally compressed, with transparent fins. Despite the name, the Black Neon Tetra is not a close relative of the common neon tetra — they belong to different genera.
Thanks to its peaceful temperament, hardiness, and undemanding nature, this fish is an excellent choice for both beginners and experienced aquarists. In a school of six or more, Black Neon Tetras display their natural behavior and look particularly impressive.
Tank Requirements
A school of Black Neon Tetras can be kept in an aquarium with a minimum volume of 40 liters. Optimal water parameters are: temperature 24-28°C, pH 6.0-7.5, and general hardness (GH) 5-15. The fish prefer soft, slightly acidic water that approximates the conditions of their natural biotope.
The aquarium should be densely planted with live vegetation while leaving enough open swimming space. Floating plants help create the subdued lighting that Black Neon Tetras prefer in the wild. Driftwood and fallen leaves make excellent decorations — they tint the water with a yellowish hue and release beneficial tannins.
A dark substrate is recommended, as it will make the fish's coloration appear significantly more vivid. Be sure to provide quality filtration and moderate water flow.
Feeding and Diet
Hyphessobrycon herbertaxelrodi is an omnivorous species with no special dietary requirements. The staple diet can consist of high-quality dry foods in flake or micro-pellet form. To maintain health and vibrant coloration, the diet should be supplemented with live and frozen foods: brine shrimp, daphnia, cyclops, and small-sized bloodworms.
In the wild, Black Neon Tetras feed on small invertebrates, insect larvae, and plant matter. Occasional vegetable supplements (spirulina, blanched vegetables) are therefore also beneficial.
Feed the fish 2-3 times daily in small portions that are consumed within 2-3 minutes. Overfeeding can lead to deteriorating water quality and health problems.
Care and Maintenance
The Black Neon Tetra is a hardy fish with a lifespan of 3-5 years when properly cared for. The basic care guidelines are straightforward:
- Weekly water changes of 20-25% to maintain stable parameters.
- Regular monitoring of temperature, pH, and water hardness using test kits.
- Timely filter cleaning and removal of organic debris from the bottom.
- Maintaining a consistent lighting schedule (8-10 hours per day).
Black Neon Tetras are fairly resistant to diseases, but under poor conditions they may be susceptible to ich (white spot disease) and fungal infections. Quarantining new fish and keeping the aquarium clean are the best preventive measures.
Compatibility
The Black Neon Tetra is an exceptionally peaceful schooling fish that is perfectly suited for community aquariums. They should be kept in groups of at least 6-8 individuals — in a school, the fish feel more confident and display more vibrant coloration.
Excellent tank mates include other peaceful characins: flame tetra, black phantom tetra, and cardinal tetra. Black Neon Tetras also get along well with corydoras, small rasboras, and peaceful dwarf cichlids.
It is not recommended to keep Black Neon Tetras with large or aggressive species that may see these small fish as prey. Tank mates prone to fin nipping should also be avoided.
Breeding
Breeding Hyphessobrycon herbertaxelrodi at home requires some experience but is quite achievable. Prepare a separate breeding tank of 10-20 liters with soft water (GH 2-4), slightly acidic pH (5.5-6.5), and a temperature of 26-28°C.
Place a spawning grid or fine-leaved plants (such as Java moss) on the bottom to protect the eggs from being eaten by the parents. Lighting should be dim.
Before spawning, separate the breeding pair for 7-10 days and feed them generously with live foods. Spawning typically occurs in the morning hours. The female lays 100-150 small eggs, after which the adults must be removed from the breeding tank.
The eggs develop within 24-36 hours, and the fry begin free-swimming after 3-4 days. First food should be infusoria and brine shrimp nauplii. The fry grow slowly and require clean water and regular feeding in small portions.