Glowlight Tetra – Profile | Care | Eggs | Breeding | Tank mates

Glowlight Tetra

Glowlight tetra is a small tropical fish from the Essequibo River, Guyana, South America. Glowlight tetras, scientific name Hemigrammus erythrozonus are shoaling fish. Shoaling fish are these fish that may live on their own, however, when there’s a predator or risk nearby, the group as much as save themselves.

Glowlight Tetra Hemigrammus erythrozonus profile

In this article, I am going to talk about Glowlight tetra size, lifespan, care, temperature, eggs, breeding, tank mates, pregnant, with a betta, etc.

It’s silver in color and bright iridescent orange to red stripe extends from the snout to the bottom of its tail, the front of the dorsal fin being the identical color because of the stripe. Different fins are silver to transparent.

The glowlight tetra is a peaceful, shoaling fish. It’s bigger than the neon tetra, and its peaceful disposition makes it an excellent, and in style, community tank fish.

They’re hardy fish and might tolerate a various range of water parameters. These species of tetra do the finest in barely acidic and soft water.

They’re very skittish in nature. While you strategy them suddenly, they tend to swim away fast and hit the partitions of the tank. This causes various injuries. If not taken care of, these accidents can result in various diseases.

H. erythrozonus is a medium-sized tetra rising to 4 to 5 cm (1.6 to 2 inches), notably bigger than each neon and cardinal tetras. It has a life span of two to 4 years when kept in good situations.

Fish Difficulty

Glowlight tetras are hardy fish that may adapt to a variety of the parameter. Being mentioned that, it’s good to preserve your water parameter don’t let the ecosystem inside your tank disrupt.

These tetras are peaceful in nature, which makes them acceptable to different peaceful community fish.

Unlink neon tetras are cardinal tetras, they do hunt shrimps so don’t hold shrimps with Glowlight tetras.

The one mistake you are able to do with this fish is by not doing regular water changes or by holding them lower than 6.

Colors and Markings

Peaceful and easy to take care of, the glowlight tetra is among the most popular of all tetras. Small and slender, they attain a grownup size of solely an inch and a half in size.

The translucent, silvery-peach-colored body of the glowlight tetra is divided by an iridescent red-gold stripe operating from snout to tail.

The stripe resembles the glowing filament in a light bulb or glowlight. The identical iridescent red color is present at the leading edge of the dorsal fin whereas the anal and pelvic fins are edged in white.

The trademark stripe of the glowlight tetra is shared by a species of rasbora, referred to as the pink line or glowlight rasbora, and the 2 fish are generally confused.

Nevertheless, the 2 species will not be from the identical genus. The most obvious difference between the 2 is the lack of an adipose fin within the rasbora.

Numbers of Fish

Glowlight tetras are schooling fish. A minimal of 10 will be the finest. You will get extra if you would like, however, don’t overstock your tank.

If you happen to get lower than 6, Glowlight tetras have a tendency to point out aggression in direction of one another. It will stress out fish, which can result in varied diseases.

Glowlight tetra Lifespan

Glowlight tetras are very hardy fish and can dwell for a really very long time. In captivity, they will live as much as at least 5 years.

If proper care is given and good meals are fed, they will live as much as 10 years.

Glowlight tetra Tankmates

Glowlight tetras like their own kind; hold them in teams of at the least a half-dozen or more.

You can even keep them with different small peaceful fish, together with different small tetras, barbs, danios, cory catfish, and peaceable loaches.

Though they’re an education fish, they are going to typically not college along with different species.

That is true even with species of similar size and form, such as because of the neon and cardinal tetra. Sluggish-moving fish and fish with lengthy fins are protected with glowlight tetras.

Nevertheless, keep away from angelfish as they eat glowlights. Keep away from all massive fish in addition to predatory species.

Moreover, any fish which can be extremely lively may prove stressful for the glowlight tetra.

Glowlight tetra Tank Size

Subsequently, they want a big space to swim around. A tank of two toes lengthy and 1 foot huge would work in the event you plan on holding them in a small quantity.

I’d suggest at the least 10 gallons (37.8 liters) if you’ll hold a small variety of fish (6). Tank size: the larger, the higher.

If you’re planning to create a neighborhood tank, then it’s good to have at the least a 75-Gallon tank.


Within the wild, they’re present in slower streams. To mimic nature, have a gradual circulation fee filter. An excessive circulation fee can stress them out.

In relation to water filters, a filter system is your serving to hand to take care of your aquarium water chemistry.

All of the helpful bacteria are housed within the filtration media inside your filter. These bacteria assist in eradicating the toxins out of your aquarium water.

Nevertheless, it fails to take away the toxins utterly. So, for that, you’ll have to change at least 10% of aquarium water each week.

If you’re confused about which filter you need to get, go for a canister filter or a Hang on Back filter.


Glowlight tetras will not be demanding fish. Any kind of decoration can work with them. You could be okay with simply plastic ornament.

If you’re buying fake plants, be sure to blunt the pointy edges, so that they don’t hurt themselves once they swim by.

All the time acclimate something you place into your aquarium; they will carry toxins that may hurt the water chemistry, making poisonous surroundings in your fish.

You should buy decorations that give loads of hiding locations. When fish are stressed, they are going to use that space to hide.


You wish to get a substrate that may make the fish even more lovely. Dark color sand or pebble with a darkish background would be the finest.

It matches the fish physique color as properly and makes the yellow-green color come out more.


They do well in all types of lighting. If you’re matching the background, substrate, and tannin water, then go for dim lights.

Glowlight Tetra

Glowlight tetra Water conditions

The water ought to be mushy to barely exhausting, d°GH of 6° to 15°, with a slightly acidic pH of 6.8, within the range 6.0 – 7.5.

It prefers a temperature of 25 °C in the range 22° – 28° °C (72° – 82 °F).

The hardiness of this fish permits it simply to adapt to more durable water, although mushy water is important for captive breeding.

Glowlight tetra Diet

Like some other tetras, Glowlight tetras are very easy to feed; they eat something that’s given to them.

They feed on the top and mid-layer of the tank. Since they’re omnivores, for finest health and color, feed them dwell and frozen meals corresponding to bloodworm or dwell meals corresponding to brine shrimp and Daphnia, together with dried flakes.

They are often fed a few times a day. Feed the fish as a lot as they will eat inside 1-2 minutes. If you will discover, you possibly can feed mosquito larvae as properly.

Correct high-quality meals can deliver their finest color and enhance their immunity to fight for diseases.

Glowlight tetra Shoaling

Like all tetras, H. erythrozonus is happiest, most lively, and most aesthetically pleasing when in a shoal. A minimal aquarium size of 60 cm will make them more comfortable when swimming.

They like a properly planted tank for hiding, however with some open water free of charge swimming.

They need to be a bunch of at least 4 with eight or extra to make them really feel safe.

They have an inclination to swim in tighter teams when a possible predator is current and swim freely when comfy.

They’re usually purchased by aquarium house owners to play a ‘second fiddle’ position to the neon tetra.

Although they often shoal individually from neon and cardinal tetras, they are going to generally shoal alongside the latter, making an arresting spectacle.

Gender identification

Like most tetras, females are bigger and extra fats bodied than the extra slender male. It might be exhausting to inform males from feminine till the fish are absolutely mature and females fill with eggs.

Glowlight tetra Breeding

H. erythrozonus breeds equally to most egg-scattering small fish. It has been bred in captivity with an average level of difficulty.

Glowlight Tetra Habitat and Care

Glowlight tetras are most engaging and likewise most comfy when stored in a darkened tank.

Select a darkish substrate and supply loads of vegetation, however, go away some open area for swimming.

Add tannins to each soften and darken the water, and add floating crops to supply the completion to the proper glowlight tetra habitat. Glowlight tetras tolerate a wider vary of water parameters than related tetras.

Glowlight tetra Breeding

Glowlight tetras will not be one of the most natural fish to breed, but when the right situations are provided, they are going to breed.

They’re egg layers and can eat the younger ones if the mother and father will not be separated. To breed, separate the breeding pair to the breeding tank.

Choose the quickest and brightest female and male. It’s higher to pick females who can be over one year old. Get 2-3 males for a number of females.

Diseases And Treatment

Glowlight tetras are hardy fish. Though they don’t get sick as usually as different fish, that doesn’t mean they don’t get sick at all.

They do get sick when they’re stored in harsh situations. So, remember to check your water parameters and tank mates.

If you have all of the parameters checked and supply healthy meals, you don’t want to fret. Nevertheless, in the event you don’t go round doing water adjustments and offering a dietary diet, they are going to get sick.

All the time get your fish quarantine tank for 1-2 weeks to see if they’re already sick or is carry parasite. Provide a nutritious diet and a weekly 50% water change. If they don’t get sick in this time period, they’re protected to put in your tank.

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