Glowlight Tetra 3cm – Hemigrammus erythrozonus

The Glowlight Tetra (Hemigrammus erythrozonus) is a small, peaceful freshwater fish known for the brilliant orange-red stripe that runs from its eye along the length of its body.

At approximately 3cm, these young Glowlight Tetras are an excellent choice for established tropical community aquariums. Their glowing stripe becomes particularly striking when they are kept as a proper school against plants, driftwood and darker aquarium backgrounds.

Glowlight Tetras are social fish and should be kept in a group of at least six, with 10 or more preferred where aquarium space allows.

Quick Care Guide

• Scientific Name: Hemigrammus erythrozonus
• Common Name: Glowlight Tetra
• Sale Size: Approximately 3cm
• Adult Size: Approximately 4cm
• Temperament: Peaceful
• Social Behaviour: Schooling
• Recommended Group: At least 6, preferably 10+
• Temperature: 24–28°C
• pH: Approximately 5.5–7.5
• Water Hardness: 2–15 dGH
• Diet: Omnivorous
• Care Level: Easy
• Origin: Essequibo River system, Guyana

A Peaceful Community Tetra

Glowlight Tetras are gentle community fish that work well with many other small, peaceful freshwater species.

Suitable tank mates can include other peaceful Tetras, rasboras, Corydoras, small peaceful catfish, dwarf Gouramis and other community fish that prefer similar water conditions.

Avoid keeping them with large or aggressive species that may intimidate them or view them as food.

Aquarium Setup

Aquariums around 60cm long or larger are suitable for a small school of Glowlight Tetras. Provide open swimming space along with plants, driftwood or other cover.

They adapt well to established community aquariums but look particularly impressive in planted tanks with subdued lighting and darker surroundings. This helps their bright orange-red stripe stand out.

Stable water quality is important, so introduce Glowlight Tetras only to a properly cycled and established aquarium.

Browse our Tropical Fish range for other compatible freshwater community species.

Feeding Glowlight Tetras

Glowlight Tetras are straightforward to feed and readily accept quality tropical flakes, micro granules and other appropriately sized aquarium foods.

For good condition and colour, provide a varied diet and occasionally supplement dried foods with small frozen or live foods such as brine shrimp, daphnia or bloodworm.

Arrive Alive Guarantee

We carefully pack our live fish for transport and back eligible orders with our Arrive Alive Guarantee.

If a fish arrives deceased, please contact us within 2 hours of delivery with your order details and clear photos of the affected fish. Once the claim has been verified, an applicable refund or store credit will be provided for the affected fish.

For full claim requirements, shipping conditions and exclusions, please read our Arrive Alive Guarantee & DOA Policy.

Frequently Asked Questions

How many Glowlight Tetras should I keep?

Glowlight Tetras should be kept in a school of at least six. Groups of 10 or more are even better where aquarium size allows and encourage more natural behaviour.

Are Glowlight Tetras peaceful?

Yes. Glowlight Tetras are generally peaceful and are an excellent choice for community aquariums containing other small, non-aggressive fish.

How large do Glowlight Tetras grow?

Glowlight Tetras usually reach approximately 4cm when fully grown.

Are Glowlight Tetras suitable for beginners?

Yes. They are hardy, peaceful and easy to feed, making them a good choice for newer fishkeepers once the aquarium is fully cycled and stable.

Are Glowlight Tetras good for planted aquariums?

Yes. Their orange-red stripe contrasts beautifully against green aquarium plants, and plant cover also provides security while leaving open areas for schooling.

Live fish may vary slightly in colour and size. The stated 3cm sale size is approximate.