
Glowlight tetra
Hemigrammus erythrozonus · Characidae
Also known as Glowlight
Beginner
A soft copper glow along a translucent body; calmer and hardier than a neon.
In short: A glowlight tetra needs at least 60 L (16 US gal), water at 22–28 °C (72–82 °F) and pH 5.8–7.5. It is peaceful, best kept in groups of 8 or more, and rated beginner to keep.
- Minimum tank
- 60 L (16 US gal)
- Temperature
- 22–28 °C (72–82 °F)
- pH
- 5.8–7.5
- Adult size
- 4 cm (1.6 in)
- Group size
- 8+
Care requirements
- Minimum tank volume
- 60 L (16 US gal)
- Temperature
- 22–28 °C (72–82 °F)
- pH
- 5.8–7.5
- Hardness
- 2–15 dGH
- Lifespan
- 3–6 years
- Diet
- Omnivore — micro pellets, flake, frozen daphnia.
- Care level
- Beginner
Origin & habitat
- Native region
- Essequibo basin, Guyana
- Water type
- Freshwater
- Biotope
- Tannin-stained forest streams
- Natural conditions
- Soft, slightly acidic, dimly lit water.
Behaviour & stocking
- Temperament
- Peaceful
- Minimum group
- 8 fish
- Swims
- Mid-water
- Good tank mates
- CorydorasHarlequin rasboraHoney gourami
- Avoid
- Large cichlidsTiger barb
Breeding & difficulty
- Breeding difficulty
- Intermediate
- Sexing
- Females are noticeably rounder.
- Notes
- Egg scatterer in fine-leaved plants; remove adults after spawning.
- Common ailments
- IchFin rot
Will it fit your tank?
Sign in and AquaLog compares Glowlight tetra against every tank you track — volume, water type, temperature and pH — then adds it to your livestock in one tap.
Sign in to check my tanks

