Glowlight Tetra (Hemigrammus erythrozonus)
The Glowlight Tetra is a small and slender, attractive, peaceful, shoaling fish. Its friendly and active disposition and ease of care make it an ideal and famous fish for the community aquarium. It should be kept with similar-sized, non-aggressive species.
This Tetra is silver in colour and has a bright iridescent orangey-red stripe that continues from the snout to the base of its tail; the front of the dorsal fin is the same colour as the stripe. The anal and pelvic fins are transparent and edged in white.
Glowlight Tetra Variants
|Scientific Name||Hemigrammus erythrozonus|
|Other Names||Glowlights, Fire Neon Tetra|
|Difficulty||Beginner - Intermediate|
|Best kept as||Groups 6+|
|Lifespan||2 - 4 years|
|Temperature||74 - 82 ℉ (23 - 28 ℃)|
|PH||5.5 - 7.5|
|GH||3 - 15|
The Glowlight Tetra originates in the Essequibo basin in Guyana. They have been found in the Potaro, Rio Essequibo, and Mazaruni Rivers in South America.
They inhabit forested areas in small tributaries off the main river channel. The water is usually stained a dark brown colour with tannins from decaying Organic matter and is often soft and highly acidic.
Other Tetras of interest
Diet & Feeding
The Glowlight Tetra will eat a variety of foods. It's essential to feed them small-sized food and to vary their diet.
They readily accept good quality crushed flakes, micro pellets and freeze-dried food. They also enjoy live and frozen fare such as brine shrimp and mosquito larvae. These Tetras will not eat any food that falls to the bottom of the tank so try not to overfeed them.
Glowlight Tetras have successfully been bred in the home aquarium, but the process is understood to be somewhat challenging.
These fish will require a separate breeding tank with very soft, warm water and dim lighting; the tank should be heavily planted with fine-leaved plants such as java moss, or a spawning mop is also suitable.
It would be better to condition your fish with high-quality flake food or live food three to five times per day.
You will know when a female is ready to spawn as she becomes very plump. At this point, you should place your best-coloured male and the female in the breeding tank. When the couple is ready to spawn, the male will dart about the tank after the female, presently performing a courting display in which he flicks his fins and shimmies near the female. When courting finishes, both fish roll on their backs, the female discharges her eggs, and the male fertilizes them.
Regular spawning will produce around 100 to 150 eggs. The parents will not provide any parental care and will consume the eggs if given the opportunity, so remove them as soon as spawning is finished.
The eggs are susceptible to light, so keep the breeding tank dark. Hatching usually occurs one day later, and the fry becomes free-swimming a couple of days later.
The fry should first be fed infusoria or paramecium cultures and then on finely crushed flake food. After several days, you can provide them with freshly hatched brine shrimp and micro worms to help them grow.