Glowlight Tetra
Hemigrammus erythrozonus
Glowlight Tetra (Hemigrammus erythrozonus) — Easy care, Peaceful, under Tetra & Characin. Minimum tank in the app: 18.5 US gal min; aim for 75–82°F and pH 5.5–7.5. Glowlight Tetras are perfect for aquarists who appreciate vibrant, active shoaling fish in a community setup.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Mostly South America
- South America
Regional colours match the stocking calculator’s origin map.
Glowlight Tetra Tank Setup
Aim for a spacious tank of at least 70 liters with a mix of open swimming areas and dense vegetation to encourage natural behavior. Soft substrate can be beneficial, and gentle filtration will maintain water quality without creating excessive flow. Moderate lighting can enhance their colors while providing an inviting atmosphere for exploration and foraging.
What Do Glowlight Tetras Eat?
Glowlight Tetras are omnivorous and thrive on micro foods such as finely crushed flakes and small pellets. They are quick feeders, so ensuring that food reaches all members of the group is crucial to minimize competition.
Glowlight Tetra Tank Mates
Ideal companions include similarly sized, non-aggressive fish such as other tetras, rasboras, and dwarf cichlids. Avoid larger or more aggressive species that might intimidate or outcompete them for food. When kept in groups, ensure that there are at least six Glowlight Tetras, as solitary individuals or small groups may display stress and weakened immune responses.
Are Glowlight Tetras Good for Beginners?
In App-aquatic we file this under easy care. That still means a cycled tank, realistic stocking, and parameters that do not swing every weekend. A frequent error is underestimating their social needs, with some aquarists attempting to keep them in groups smaller than six. This often results in increased stress and aggression among individuals.
Building a community? Run the full list through the stocking calculator before you add anything else.
Log tests and reminders in App-aquatic—free, same data you see here.




