AquaSage
Species library

Glowlight Tetra

Hemigrammus erythrozonus

Characidae

FishDifficulty: ●●○○○Data: well-established

About

The glowlight tetra is a small, slender characin native to the forested blackwater tributaries of the Essequibo River in Guyana, where it drifts through soft, tannin-stained water in loose shoals. A translucent silver body is bisected by a single luminous orange-red stripe that glows like a filament, an effect that intensifies over dark substrate and dim, planted surroundings. Hardy, peaceful and long popular with beginners, it makes an outstanding centrepiece for calm nano and community aquariums.

Care

Keep a shoal of at least 6 (ideally 10+) in a well-planted tank with soft, slightly acidic water, gentle flow and dark substrate. Pair only with equally peaceful, similarly sized tankmates.

Diet

Micro-omnivore that grazes small invertebrates and organic particles in the wild; feed small dry foods supplemented with regular frozen or live micro-foods.

Tankmate compatibility

Possible with care (93)

Avoid (28)

Computed by the AquaSage engine for a spacious reference tank — always check the full verdict for your exact setup in the calculator.

Sources