Glowlight Tetra Care Guide
The glowlight tetra (Hemigrammus erythrozonus) is a small and elegant tropical freshwater fish popular in the UK. Known for its shimmering silver body and glowing orange stripe, it's a favourite for planted and community aquariums.
In this guide, you'll learn everything you need to know about glowlight tetra care, including tank size, water conditions, compatibility, feeding, and typical UK prices - plus how to buy or sell them locally.
Quick facts about Glowlight Tetras
Glowlight tetras are small schooling fish native to South America. Their defining feature is a bright, glowing orange stripe that runs along their body, giving them a subtle but eye-catching appearance.
They are peaceful, hardy, and well-suited to community tanks.
Hemigrammus erythrozonus
3-4 cm
Guyana (South America)
60L (15gal)
3-5 years
Peaceful, shoaling
24-28°C
Omnivore (flakes, micro pellets, frozen, live foods)
5.5-7.5
£2-£4 per fish
How Many Glowlight Tetras Should You Keep?
Glowlight tetras are shoaling fish and should always be kept in groups.
- Minimum group size of 6-10
- Groups of 12+ are ideal
- Larger groups encourage tighter schooling behaviour
Keeping too few can lead to:
- Stress and hiding
- Dull colouration
- Reduced activity
In larger groups, they display more natural and confident behaviour.
Ideal Tank Conditions for Glowlight Tetras
Providing the right environment helps glowlight tetras show their best colour and behaviour.
- Tank Setup: Well-planted aquarium with open swimming areas
- Substrate: Dark substrate enhances their glowing stripe
- Plants & Decor: Dense planting, driftwood, and shaded areas
- Water Conditions: Soft to slightly acidic water preferred
- Filtration & Flow: Gentle flow with good filtration
- Lighting: Dim to moderate lighting
A natural, slightly shaded setup helps them stand out.
Compatibility with Other Fish
Glowlight 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
They are calm and mix well in peaceful setups.
Are Glowlight Tetras Easy to Care For?
Glowlight tetras are easy to care for and suitable for beginners.
They require:
- A stable, cycled tank
- A proper group size
- Clean water
- A varied diet
They are hardy and forgiving compared to some other tetra species.
Glowlight Tetra Price in the UK
In the UK, glowlight tetras typically cost between £2-£4 per fish.
Prices vary depending on:
- Size and condition
- Availability
- Shop vs hobbyist sellers
They are widely available and affordable.
Where to Buy Glowlight Tetras in the UK
Glowlight 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 Glowlight Tetras?
Yes - glowlight tetras are sometimes 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 responsible aquarists
TankMate UK allows you to list fish quickly and find local buyers.
Feeding Glowlight Tetras
Glowlight 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, brine shrimp)
- Feed small amounts regularly
- Ensure food is small enough for their mouths
- A varied diet helps maintain health and colour.
Common Problems with Glowlight Tetras
Faded colour, often caused by:
- Stress
- Poor water quality
- Inadequate diet
Hiding behaviour, linked to:
- Too small a group
- Lack of cover
Stress, caused by:
- Aggressive tankmates
- Poor water conditions
Why Glowlight Tetras Are So Popular
- Subtle glowing orange stripe
- Peaceful and community-friendly
- Hardy and beginner-friendly
- Ideal for planted aquariums
- Affordable and widely available
When kept correctly, glowlight tetras add a soft, shimmering glow to any aquarium.
Frequently Asked Questions
At least 6-10, though larger groups are recommended.
Yes, they are hardy and easy to care for.
Yes, they thrive in planted tanks with cover.
At least 60 litres, with more space preferred for larger groups.
Looking to Buy or Sell Glowlight 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.