Neon Tetra Care Guide
The neon tetra (Paracheirodon innesi) is one of the most popular tropical freshwater fish in the UK. Known for its bright blue stripe and vibrant red colouring, it's a staple in community and planted aquariums.
In this guide, you'll learn everything you need to know about 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 Neon Tetras
Neon tetras are small schooling fish native to South America. They are easily recognised by their iridescent blue stripe and red lower body, which create a glowing effect under aquarium lighting.
They are peaceful, active, and best kept in groups.
Paracheirodon innesi
3-4 cm
Amazon Basin (Peru, Colombia, Brazil)
60L (15gal)
3-5 years
Peaceful, shoaling
22-26°C
Omnivore (flakes, micro pellets, frozen, live foods)
5.5-7.0
£1-£3 per fish
How Many Neon Tetras Should You Keep?
Neon tetras are shoaling fish and should always be kept in groups.
- Minimum group size of 6-10
- Groups of 12+ are ideal
- Larger groups create stronger schooling behaviour
Keeping too few can lead to:
- Stress and hiding
- Faded colouration
- Increased susceptibility to illness
In larger groups, they display their classic schooling patterns.
Ideal Tank Conditions for Neon Tetras
Providing the right environment helps neon tetras thrive and display their best colours.
- Tank Setup: Well-planted aquarium with open swimming areas
- Substrate: Dark substrate enhances their colours
- Plants & Decor: Dense planting, driftwood, and shaded areas
- Water Conditions: Soft, slightly acidic water preferred
- Filtration & Flow: Gentle flow with good filtration
- Lighting: Dim to moderate lighting
A natural, slightly shaded environment mimics their native habitat.
Compatibility with Other Fish
Neon tetras are peaceful and ideal for community aquariums.
- Good Tankmates: other small tetras, rasboras, corydoras catfish, dwarf cichlids, and small gouramis
- Avoid: large or aggressive fish that may see them as food
Their small size means careful tankmate selection is important.
Are Neon Tetras Easy to Care For?
Neon tetras are easy to moderately easy to care for and suitable for beginners.
They require:
- A stable, cycled tank
- Good water quality
- A proper group size
- A varied diet
They are hardy but can be sensitive when first introduced.
Neon Tetra Price in the UK
In the UK, neon tetras typically cost between £1-£3 per fish.
Prices vary depending on:
- Size and condition
- Availability
- Shop vs hobbyist sellers
They are one of the most affordable and widely available aquarium fish.
Where to Buy Neon Tetras in the UK
Neon tetras are widely available in UK aquarium shops and from private sellers.
Sourcing fish locally can:
- Reduce transport stress
- Improve survival rates
- Offer better value
TankMate UK helps connect fishkeepers who want to buy, sell, or rehome fish safely - without shipping.
Can You Sell Neon Tetras?
Yes - neon tetras are sometimes bred and sold by hobbyists, though breeding can be more challenging than with some species.
Selling locally is often the best option, as it:
- Minimises stress for the fish
- Avoids the risks of shipping
- Connects you with responsible aquarists
TankMate UK allows you to list fish quickly and find local buyers.
Feeding Neon Tetras
Neon tetras are omnivorous and require a varied diet.
Key Tips:
- Feed high-quality flakes or micro pellets
- Supplement with frozen or live foods (e.g. daphnia, baby brine shrimp)
- Feed small amounts regularly
- Ensure food is appropriately sized
- A varied diet helps maintain their bright colours.
Common Problems with Neon Tetras
Faded colouration, often caused by:
- Stress
- Poor water quality
- Inadequate diet
Neon tetra disease, linked to:
- Parasitic infections
- Poor tank conditions
Sudden death after introduction, caused by:
- Poor acclimation
- Unstable tank conditions
Why Neon Tetras Are So Popular
- Iconic blue and red colouration
- Peaceful and community-friendly
- Ideal for planted aquariums
- Affordable and widely available
- Beautiful schooling behaviour
When kept correctly, neon tetras create a vibrant and lively display in any aquarium.
Frequently Asked Questions
At least 6-10, though larger groups are recommended.
Yes, they are beginner-friendly with a stable tank.
A condition that causes colour loss and deterioration, often linked to parasites.
At least 60 litres, with more space preferred for larger groups.
Looking to Buy or Sell Neon Tetras Locally?
TankMate UK connects fishkeepers who want to buy, sell, or rehome fish safely within their local area.
Whether you're stocking your aquarium or passing fish on to a new home, 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.