Buenos Aires Tetra Care Guide
The Buenos Aires Tetra (Hyphessobrycon anisitsi) is a hardy and active freshwater fish popular among UK aquarists. Known for its shimmering silver body, red-tinted fins, and energetic schooling behaviour, it is one of the most robust tetra species available and an excellent choice for larger community aquariums.
In this guide, you'll learn everything you need to know about Buenos Aires Tetra care, including tank size, water conditions, compatibility, feeding, and typical UK prices - plus how to buy or sell them locally.
Quick facts about Buenos Aires Tetras
Buenos Aires tetras are native to South America and inhabit rivers, streams, and floodplains throughout Argentina, Paraguay, and Brazil. They are larger and more active than many popular tetra species and are renowned for their adaptability and hardiness.
Their reflective silver bodies and flashes of red make them particularly attractive when kept in large schools.
Hyphessobrycon anisitsi
6-8 cm
Argentina, Paraguay, Brazil, and Uruguay
90L (24gal)
5-8 years
Active, semi-peaceful, schooling
18-28°C
Omnivore (flakes, pellets, frozen foods, vegetable matter)
6.0-8.0
£2-£6 per fish
How Many Buenos Aires Tetras Should You Keep?
Buenos Aires tetras are schooling fish and should always be kept in groups.
- A minimum group of 6-8 is recommended
- Larger schools encourage natural behaviour and reduce aggression
- Groups of 10 or more create an impressive display
Keeping too few can result in:
- Increased fin-nipping
- Stress and nervous behaviour
- More aggressive interactions with tankmates
They are most peaceful when maintained in sizeable groups.
Ideal Tank Conditions for Buenos Aires Tetras
Providing the right environment helps Buenos Aires tetras remain healthy and active.
- Tank Setup: Spacious aquarium with open swimming areas
- Substrate: Sand or gravel substrate
- Plants & Decor: Driftwood, rocks, and robust plants
- Water Conditions: Stable, well-oxygenated freshwater
- Filtration & Flow: Moderate filtration with gentle to moderate current
- Lighting: Moderate lighting
Unlike many tetras, they tolerate slightly cooler temperatures.
Compatibility with Other Fish
Buenos Aires tetras are generally peaceful but can be boisterous.
- Good Tankmates: bloodfin tetras, Congo tetras, rainbowfish, corydoras catfish, larger rasboras, and peaceful barbs
- Avoid: long-finned fish such as bettas, fancy guppies, angelfish, and delicate gouramis
They have a reputation for nibbling soft plant leaves and occasionally fin-nipping if kept in small groups.
Are Buenos Aires Tetras Easy to Care For?
Buenos Aires tetras are very easy to care for and ideal for beginners.
They require:
- Good water quality
- Proper shoal sizes
- Plenty of swimming space
- A varied diet
They are among the hardiest tetra species commonly available.
Buenos Aires Tetra Price in the UK
In the UK, Buenos Aires tetras typically cost between £2-£6 per fish.
Prices vary depending on:
- Size and age
- Availability
- Shop vs hobbyist breeders
They are affordable and widely available.
Where to Buy Buenos Aires Tetras in the UK
Buenos Aires tetras are available from most aquarium shops and tropical fish retailers.
Sourcing fish locally can:
- Reduce transport stress
- Allow you to inspect health and body condition
- Offer better value
TankMate UK helps connect fishkeepers who want to buy, sell, or rehome fish safely - without shipping.
Can You Sell Buenos Aires Tetras?
Yes - Buenos Aires 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 Buenos Aires Tetras
Buenos Aires tetras are omnivorous and enthusiastic feeders.
Key Tips
- Feed high-quality flakes or pellets
- Supplement with frozen bloodworms, daphnia, and brine shrimp
- Offer vegetable-based foods and occasional blanched greens
- Feed small portions 1-2 times daily
A varied diet helps maintain vibrant colours and overall health.
Common Problems with Buenos Aires Tetras
Fin-nipping, often caused by:
- Small shoal sizes
- Overcrowding
- Inadequate stimulation
Plant damage, linked to:
- Their tendency to nibble soft-leaved plants
Stress and aggression, caused by:
- Insufficient swimming space
- Poor group dynamics
Why Buenos Aires Tetras Are So Popular
- Hardy and adaptable
- Attractive silver and red coloration
- Excellent schooling behaviour
- Suitable for slightly cooler aquariums
- Ideal for beginners and experienced aquarists alike
When kept correctly, Buenos Aires tetras create a lively and energetic display that brings movement and colour to larger community aquariums.
Frequently Asked Questions
Yes, they are among the hardiest and easiest tetra species to keep.
They may nibble soft-leaved plants, so robust species are recommended.
At least 6-8, though larger schools are preferable.
At least 90 litres, with plenty of swimming space and a suitable shoal.
Looking to Buy or Sell Buenos Aires Tetras Locally?
TankMate UK connects fishkeepers who want to buy, sell, or rehome fish safely within their local area.
Whether you're adding a lively shoal to your community aquarium or looking to rehome fish responsibly, 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.