Black Neon Tetra Care Guide
The Black Neon Tetra (Hyphessobrycon herbertaxelrodi) is a peaceful and hardy freshwater fish popular among UK aquarists. Despite its name, it is not closely related to the Neon Tetra, but its striking black stripe and shimmering silver-white band make it one of the most attractive schooling fish for community aquariums.
In this guide, you'll learn everything you need to know about Black Neon Tetra care, including tank size, water conditions, compatibility, feeding, and typical UK prices - plus how to buy or sell them locally.
Quick facts about Black Neon Tetras
Black neon tetras are native to South America and inhabit slow-moving streams and tributaries. They are renowned for their hardiness, making them one of the best tetra species for beginners.
Their contrasting black and iridescent silver stripe creates a stunning effect when kept in large shoals.
Hyphessobrycon herbertaxelrodi
3-5 cm
Brazil and Paraguay
60L (15gal)
5-8 years
Peaceful, schooling
22-28°C
Omnivore (flakes, micro pellets, frozen and live foods)
5.5-7.5
£2-£5 per fish
How Many Black Neon Tetras Should You Keep?
Black neon tetras are shoaling fish and should always be kept in groups.
- A minimum group of 6-8 is recommended
- Larger shoals create more natural behaviour and a more impressive display
- Groups of 10-20 fish are ideal in planted aquariums
Keeping too few can lead to:
- Nervous behaviour
- Stress and hiding
- Reduced colouration
They are most confident when surrounded by their own species.
Ideal Tank Conditions for Black Neon Tetras
Providing the right environment helps black neon tetras display their best colours and behaviour.
- Tank Setup: Planted aquarium with open swimming areas
- Substrate: Dark substrate enhances colour contrast
- Plants & Decor: Dense planting, driftwood, leaf litter, and shaded areas
- Water Conditions: Soft to moderately hard stable freshwater
- Filtration & Flow: Gentle to moderate filtration
- Lighting: Moderate lighting
A mature planted aquarium helps them feel secure.
Compatibility with Other Fish
Black neon tetras are peaceful and ideal for community aquariums.
- Good Tankmates: glowlight tetras, lemon tetras, harlequin rasboras, honey gouramis, corydoras catfish, kuhli loaches, and cherry shrimp
- Avoid: large predatory fish and highly aggressive species
Their peaceful nature makes them suitable for a wide range of community setups.
Are Black Neon Tetras Easy to Care For?
Black neon tetras are easy to care for and excellent for beginners.
They require:
- Stable water quality
- Appropriate shoal sizes
- Regular feeding
- Peaceful tankmates
They are generally hardier than many other popular tetra species.
Black Neon Tetra Price in the UK
In the UK, black neon tetras typically cost between £2-£5 per fish.
Prices vary depending on:
- Size and age
- Availability
- Shop vs hobbyist breeders
They are affordable and widely available.
Where to Buy Black Neon Tetras in the UK
Black neon tetras are available from most aquarium shops and tropical fish retailers.
Sourcing fish locally can:
- Reduce transport stress
- Allow you to inspect health and colouration
- Offer better value
TankMate UK helps connect fishkeepers who want to buy, sell, or rehome fish safely - without shipping.
Can You Sell Black Neon Tetras?
Yes - black neon tetras are occasionally bred and sold by hobbyists.
Selling locally is often the best option, as it:
- Minimises stress for the fish
- Avoids the risks of shipping
- Connects you with local aquarists
TankMate UK allows you to list fish quickly and find local buyers.
Feeding Black Neon Tetras
Black neon tetras are omnivorous and easy to feed.
Key Tips
- Feed high-quality flakes or micro pellets
- Supplement with frozen foods such as daphnia, cyclops, and bloodworms
- Offer occasional live foods
- Feed small portions 1-2 times daily
A varied diet supports health and colouration.
Common Problems with Black Neon Tetras
Faded colours, often caused by:
- Stress
- Poor water quality
- Inadequate diet
Shy behaviour, linked to:
- Small shoal sizes
- Lack of planting and cover
Disease outbreaks, caused by:
- Poor maintenance
- Overcrowding
- Sudden parameter changes
Why Black Neon Tetras Are So Popular
- Striking black and silver coloration
- Hardier than many tetra species
- Peaceful and community-friendly
- Excellent schooling behaviour
- Ideal for beginners and experienced aquarists alike
When kept correctly, black neon tetras create a beautiful display of movement and contrast in planted aquariums.
Frequently Asked Questions
Not closely. Despite the name, they belong to a different genus and have slightly different care requirements.
At least 6-8, though larger shoals are highly recommended.
Yes, they are among the hardiest and easiest tetra species to keep.
At least 60 litres, with plenty of swimming space and a suitable shoal.
Looking to Buy or Sell Black Neon Tetras Locally?
TankMate UK connects fishkeepers who want to buy, sell, or rehome fish safely within their local area.
Whether you're building a peaceful community aquarium or looking to rehome surplus fish, you can:
- Browse fish available near you
- List your own fish in minutes
- Avoid the risks of shipping
Explore local listings with TankMate UK and find the right fish for your aquarium.