PeekFishDiscover what makes each fish differentFishkeeping guides
EN ▾
Glowlight tetra — AI-generated side-view illustration

Glowlight tetra

Hemigrammus erythrozonus

One orange-red line on a translucent silver body

A narrow bright stripe stands out against the pale body. Ember tetras have orange spread more widely over the body.

Adult length
Up to 4 cm (standard length, without the tail fin)
Water temperature
24–28 °C
Lifespan
2–4 years
pH
5.5–7.5
Hardness
2–15 dGH
Native range
Native to the Essequibo River system.
Natural habitat
Unknown

Larger predatory tankmates are a risk. Very sparse surroundings may make the colour appear subdued.

View comparison →

Same-species behaviour

Keep at least 6, preferably 10 or more.

Space requirements

Use a 60 × 38 × 30 cm aquarium for a small group.

Diet and feeding

Offer suitably small flakes or granules alongside small live and frozen foods.

Compatibility limits

Choose peaceful companions after checking conditions and predation risk.

Aquarium environment

Dense plants, shade and wood offer visual cover.

Sources

www.fishbase.se ↗ 2026-10-25

www.seriouslyfish.com ↗ 2026-10-21

researcharchive.calacademy.org ↗ 2026-10-22

realaquatics.co.uk ↗ 2026-10-22

blog.aq4aquaristik.de ↗ 2026-10-22

PeekFish · Ornamental fish

Privacy and analytics