--- type: species title: "Glowlight Danio Care Guide: Tank Size, Tank Mates & Breeding" slug: "glowlight-danio" category: "freshwater" scientificName: "Danio choprae" subcategory: "Danio" lastUpdated: "2026-04-24" readingTime: 9 url: https://www.fishstores.org/species/glowlight-danio --- # Glowlight Danio Care Guide: Tank Size, Tank Mates & Breeding *Danio choprae* Master Glowlight Danio (Danio choprae) care. Learn about their iridescent colors, ideal water parameters (72-78°F), schooling behavior, and the best tank mates. ## Species Overview Glowlight danios (*Danio choprae*) are the smaller, more iridescent cousin of the standard zebra danio you grew up with. Reaching only about 1.25 to 1.5 inches at full size, they qualify as a true nano fish, but they keep all of the high-octane swimming energy of their bigger relatives packed into a body roughly half the length. The look is what sells them: a silver-blue base with a horizontal coppery-orange band that flashes bright gold under aquarium lighting, broken up by a few vertical bars near the tail. They are an Asian cyprinid from a small range in the Irrawaddy River drainage of northern Myanmar (Burma), where they live in clear, cool, well-oxygenated hill streams. In the home aquarium they translate that habitat into a tight, fast-moving school that occupies the upper two-thirds of a planted tank. Stock them in groups of six or more in a long-footprint nano tank and they reward you with the kind of constant, coordinated motion that most "easy" species cannot match. | Field | Value | | ----------- | ---------------------------------- | | Adult size | 1.25-1.5 in (3-4 cm) | | Lifespan | 3-5 years | | Min tank | 10 gallons (school of 6+) | | Temperament | Peaceful, active | | Difficulty | Beginner-Intermediate | | Diet | Omnivore (micro-predator) | | Temperature | 72-78°F | | Schooling | 6+ minimum, 8-10 ideal | | Origin | Northern Myanmar (Irrawaddy basin) | > **A true nano cousin of the zebra danio** > > Glowlight danios sit in the same genus as the standard [zebra danio](/species/zebra-danio) but stay roughly two-thirds the size at full maturity. If a zebra is a 2-inch torpedo, a glowlight is a 1.25-1.5 inch dart. The smaller body, warmer temperature requirement, and more peaceful disposition make them a better fit for established nano tanks where a regular zebra would be too large and too pushy. ### Origin: Northern Myanmar Hill Streams The species was first described in 1934 by British ichthyologist Sunder Lal Hora, who collected the type specimens from a clear stream in the Putao region of northern Myanmar. The native range covers a small section of the upper Irrawaddy River drainage, where water temperatures stay cooler than the lowland tropics and pH runs slightly acidic to neutral. That habitat profile matters for how you keep them. Wild glowlights live in clear water with moderate flow over fine gravel and leaf-litter substrates, with overhanging riparian vegetation that drops insect larvae and small terrestrial invertebrates into the current. They expect oxygenated water, real horizontal swimming room, and the safety of a school. Replicate those basics and the species essentially keeps itself. ### Glowlight Danio vs. GloFish: Settling the Confusion This is the question new keepers ask most often, and the answer is straightforward. Glowlight danios are a naturally occurring iridescent species. The "glow" in their name refers to the way their scales catch and refract aquarium light, producing the bright copper-gold band that runs the length of their flanks. No genetic modification, no inserted fluorescent protein, no patent. GloFish Danios, by contrast, are patented [genetically modified zebra danios](/species/glofish-danio) that carry a fluorescent protein gene from a jellyfish or sea anemone. Different species (*Danio rerio* vs. *Danio choprae*), different origin (Myanmar vs. lab-engineered), different look under blue or actinic light. A glowlight danio looks gorgeous under standard white LEDs and unremarkable under UV; a GloFish does the opposite. ### Appearance & Lifespan Adult glowlight danios reach roughly 1.25 to 1.5 inches (3 to 4 cm) in the home aquarium. The body is laterally compressed and torpedo-shaped, with a silver-blue base color that shifts to deep blue along the dorsal surface. The defining feature is a horizontal coppery-orange to gold band that runs from the gill plate to the caudal peduncle, broken up by 4 to 6 narrow vertical dark bars near the tail. Fins are short, clear, with a pale yellow wash on the dorsal and anal fins. Sexual dimorphism is subtle but learnable. Males are slimmer with more saturated orange-gold along the lateral band, especially during spawning behavior. Females are noticeably rounder in the belly, particularly when gravid, and tend to show slightly muted body color. Expect 3 to 5 years of life from a well-kept school, with stable parameters and a varied diet pushing some individuals into year six. ## Water Parameters & Tank Requirements Glowlight danios are forgiving on absolute numbers and intolerant of swings or extremes. Pick a target inside the ranges below and hold it steady with weekly water changes. ### Temperature and pH Aim for a temperature range of 72 to 78°F (22 to 26°C). Unlike the cool-tolerant zebra danio, glowlights come from a warmer slice of the Irrawaddy basin and do not tolerate sustained sub-tropical temperatures the way their larger cousin does. A reliable aquarium heater set to 75°F is the right baseline. Target a pH of 6.0 to 7.5, with a general hardness of 2 to 10 dGH. Most municipal tap water in North America falls inside that window without adjustment. Stability matters more than precision; chasing a specific decimal point with chemicals causes more crashes than any natural drift would. > **Stability beats precision** > > A glowlight danio in stable 75°F water at pH 7.4 will outlive one bounced between 72°F and 80°F at a "perfect" 6.8. Pick a target inside the ranges above, hold it with weekly 25% water changes, and resist the urge to chemically chase a specific number. The species evolved in clear hill streams that gradually shift with the seasons, not in test-kit precision. ### Tank Size: Why 20-Gallon Long Beats 10-Gallon Standard A 10-gallon tank is the practical minimum for a school of six glowlight danios. The 10-gallon footprint gives just enough horizontal length for the school to move as a unit without crashing into the back glass on every lap. It is the floor, not the ceiling. A [20-gallon long](/guides/20-gallon-fish-tank) is the better baseline. The 30-inch footprint gives the school real horizontal swimming room, allows you to keep 8 to 10 fish without crowding, and adds the water volume that makes parameter stability easier. Tall tanks waste vertical space on a species that almost never uses the bottom third of the water column. Pick length over height every time. The brief 15-gallon "long" footprint also works well if shelf depth is the constraint. ### Filtration, Flow, and Oxygenation Glowlights prefer moderate, oxygen-rich current that mimics the hill-stream conditions of their native range. A standard hang-on-back (HOB) filter rated for the tank size produces enough flow to keep them happy and eliminates the dead spots that breed nuisance algae. A dual sponge filter driven by an air pump works for breeding setups (no impeller intake to chew up fry) and as a secondary oxygenator. Point the filter outflow lengthwise across the tank rather than down at the substrate. Glowlights will visibly orient themselves into the flow and patrol against it, which is the behavior you want. A small airstone or surface agitator added to a 10 to 20 gallon tank improves dissolved oxygen levels and noticeably brightens the school's color and activity within a day or two. ### Tank Decor Aquascape for swimming room, not coverage. Keep the front and middle of the tank as open horizontal lanes and push driftwood, rockwork, and tall plants to the back and sides. Glowlights spend the vast majority of their time in the open water column, and a tank crowded with hardscape robs them of their natural pattern of movement. Fine-leaved plants such as java moss, hornwort, water sprite, and Ceratopteris serve double duty as cover and spawning sites. A dark substrate of fine sand or small natural gravel deepens the contrast and brings out the body's iridescence in a way that bright white substrates flatten. Add floating plants to soften overhead lighting and a few almond leaves or tannin source to nudge the tank toward the slightly tea-stained, low-glare conditions of the species' native streams. ## Diet & Feeding Glowlight danios are omnivorous micro-predators. In the wild they eat insect larvae, small zooplankton, copepods, and a fair amount of plant matter and algae scraped from rocks. In the home aquarium they accept just about any small food that fits in their tiny mouths. ### Daily Foods A high-quality micro-pellet or crushed flake formulated for tropical community fish is fine as a daily staple. Look for a protein content around 35 to 45 percent and an ingredient list led by whole fish, krill, or shrimp meal rather than fish-meal byproducts. Crush flakes between your fingers before sprinkling, or pick a brand sold specifically as "nano" or "micro" sized; a glowlight mouth is small enough that whole flakes often go uneaten and end up rotting on the substrate. Feed twice daily, with each portion small enough to be consumed in about two minutes. Skip one day per week to give digestion a break and keep the tank cleaner. Fasting is good practice for almost every freshwater community fish and especially helpful for an enthusiastic eater with a tiny stomach. ### Treats and Live Foods Rotate in frozen or live foods 2 to 3 times per week to keep color and breeding output strong. Daphnia, cyclops, baby brine shrimp, microworms, and finely chopped frozen bloodworms are all eagerly accepted and replicate the invertebrate-heavy wild diet. The orange and gold band along the flanks visibly intensifies within a few weeks of consistent live or frozen feeding, especially when daphnia and cyclops are part of the rotation; both contain natural carotenoids that the fish convert into pigment. ## Tank Mates & Compatibility Glowlight danios are peaceful with anything they cannot out-eat, which is most things since they are so small. The two compatibility quirks to design around are their speed (which can stress slow eaters) and their tendency to nip when their school is too small. > **The Rule of Six (or better, eight)** > > A glowlight danio kept in a group of three or four redirects its schooling instinct into chasing and nipping tank mates. The fix is almost always more glowlights, not fewer. A school of eight rarely bothers other fish because the social hierarchy and chase behavior plays out within the group itself. Unlike the larger danios, glowlights are small enough that even a school of ten fits comfortably in a 20-gallon long. ### Best Community Companions Pair glowlights with similarly active, similarly sized peaceful nano species. Sparkling gouramis, kuhli loaches, otocinclus, pygmy corydoras, and dwarf chain loaches all work well as bottom-dwelling counterparts that occupy a different layer of the tank. Most small tetras (ember, neon, cardinal, glowlight tetra) make excellent mid-water companions, as do harlequin and chili rasboras. Nerite snails and Amano shrimp handle algae and detritus duty without being bothered. Cherry shrimp adults are usually safe in a heavily planted tank, but expect their juveniles to be picked off; if you want a shrimp colony to thrive alongside glowlights, give it dense moss cover and accept some predation as the cost of the look. ### Species to Avoid Slow-finned, slow-moving fish are the obvious mismatch. Adult bettas, fancy long-finned guppies, and pearl gouramis carry the kind of trailing finnage that triggers a glowlight's instinct to test-nibble, and even when no fins get clipped, the constant chase stresses the slower fish into hiding. Skip large cichlids of any kind; oscars, jack dempseys, and most South American cichlids will eat a 1.5-inch glowlight as a snack. Even peaceful cichlids like rams and apistogrammas will pick glowlights off the school in a small tank. Avoid mixing them with the larger and more aggressive [giant danio](/species/giant-danio), which will simply outcompete them at every feeding and disrupt the school. The closely related [leopard danio](/species/leopard-danio) is the better large-genus companion if you want a multi-species danio display, since it stays small and shares parameter preferences. ## Breeding Glowlight Danios Glowlight danios are an egg-scattering species that breeds reliably in the home aquarium with the right setup. Like all danios, the challenge is not getting them to spawn but protecting the eggs from the parents long enough for fry to hatch. ### Conditioning a Breeding Group Condition a small breeding group (one or two males with two or three females) in the main tank for a week on heavy frozen and live foods: daphnia, baby brine shrimp, microworms, and chopped bloodworms. Females visibly fill out as eggs develop, becoming noticeably rounder in front of the anal fin. Males intensify their orange-gold band and begin chasing females in the early morning hours. ### Spawning Tank Setup The standard breeding setup is a separate 10-gallon tank with a marble or mesh bottom (no substrate). The marbles or mesh create gaps that eggs fall through, putting them out of reach of the parents. Fill with the same water as the main tank, drop the pH slightly to 6.5 if your main tank runs harder, add a sponge filter on low flow, and bump the temperature to 78°F to trigger spawning. Move the conditioned group to the breeding tank in the evening. Spawning typically occurs at dawn the next morning, with the females scattering 50 to 200 eggs across the marble bottom. Remove the adults immediately after spawning. Eggs hatch in 36 to 60 hours at 78°F. Newly hatched fry are tiny, around 3 mm long, and survive on yolk sac for the first 2 to 3 days. After that, feed infusoria or commercial liquid fry food for the first week, then transition to baby brine shrimp by day 7 to 10. Sexual maturity is reached at roughly 4 to 5 months in captivity. ## Common Health Issues Glowlights are moderately hardy but not bulletproof. The two diseases below cover roughly 80 percent of what you will encounter in a typical glowlight tank. ### Ich and Velvet Disease Ich (white spot disease, *Ichthyophthirius multifiliis*) is the most common parasite in glowlight tanks, almost always triggered by a temperature swing or new fish introduction. Symptoms are tiny white grains scattered across the body and fins, often accompanied by flashing (rubbing against decor). Treat by raising the tank temperature to 82°F over 24 hours and dosing a copper-free ich medication for the full 14-day life cycle of the parasite. Do not stop treatment when spots disappear; the parasite is still in its substrate-bound phase. Velvet (*Oodinium*) is the more dangerous parasitic disease for the species and produces a fine gold or rust-colored dust coating on the skin that is easiest to spot under a flashlight in a darkened room. It progresses faster than ich and kills within days if untreated. Quarantine, dim the lights (the parasite uses photosynthesis), and treat with a copper-based or formalin-based medication in a hospital tank. Velvet outbreaks usually trace back to wild-caught imports added without quarantine. ### Stress-Induced Jumping Glowlight danios are accomplished jumpers, especially when startled, when spawning, or when water quality declines. A tight-fitting lid or glass cover with no gaps wider than your pinky finger is mandatory. Cutouts for filter intakes, heater cords, and feeding ports should be tightly fitted with foam or mesh. The species' small size makes a single jump-out fatal within minutes, since dehydration and impact damage are immediate. Watch for clamped fins, faded color, hiding, and reluctance to school as early stress markers. The triggers are almost always water-quality issues (test ammonia, nitrite, and nitrate first) or social stress from too small a school. ## Where to Buy & What to Look For Glowlight danios are a moderately common species in the freshwater trade, sold by most independent fish stores and many of the better online retailers. They are often labeled simply as "glowlight danio" or sometimes as the older trade name "Burmese zebra danio." Pricing typically falls in the $4 to $7 per fish range, with discounts when bought in groups of six or more. > **Buy in groups, never as singles or pairs** > > Whenever possible, buy your full school of six to ten in a single trip from the same display tank. Mixing groups from different tanks (and especially different stores) introduces new pathogens, disrupts the existing social hierarchy, and stresses both the new and existing fish. A reputable local fish store will discount a school of six or more as a single purchase; ask before paying per-fish. ### Inspecting Store Stock Watch the store's glowlight tank for a full minute before pointing at any fish. Healthy glowlights school tightly, swim constantly in the upper two-thirds of the tank, and chase each other in playful bursts. The orange-gold band along the flank should be vivid and crisp; washed-out, gray, or faded specimens are stressed, sick, or recently shipped and need more recovery time than the store has given them. Skip any tank where glowlights are hanging at the surface gasping, drifting near the bottom, showing clamped fins, or displaying white spots, gold dust, or frayed fins. Check eyes for clarity, fins for intactness, and the substrate for dead fish. If even one fish in the display looks sick, do not buy from that tank; danios share water and disease moves fast through the species. ### Acclimation and Quarantine Drip-acclimate over 30 to 45 minutes when transferring; the species is sensitive to sudden parameter swings, especially in pH and hardness. See the [acclimation guide](/guides/how-to-acclimate-fish) for the step-by-step method. Quarantine new glowlights for 14 days in a separate 5 to 10 gallon tank with a sponge filter and heater before adding them to your main display. The quarantine window catches late-onset disease (especially velvet, which can incubate silently for over a week), lets you confirm the fish are eating normally, and prevents wiping out an established community over a $5 fish. The species' Myanmar origin means many specimens are a mix of wild-caught and tank-bred imports, and wild-caught fish in particular benefit from the extra observation period. For a broader look at choosing your first community species, see the [freshwater fish overview](/guides/freshwater-fish). ## Quick Reference - **Adult size:** 1.25-1.5 inches (3-4 cm) - **Tank size:** 10 gallons minimum (school of 6); 20-gallon long preferred for 8-10 fish - **Temperature:** 72-78°F (heater required) - **pH:** 6.0-7.5 - **Hardness:** 2-10 dGH - **Filtration:** HOB or sponge filter producing moderate horizontal flow; surface agitation helps - **Diet:** High-quality micro-pellet or crushed flake 2x daily + frozen/live daphnia, cyclops, or baby brine 2-3x weekly - **School size:** 6 minimum, 8-10 ideal - **Tank mates:** Sparkling gouramis, kuhli loaches, ember tetras, harlequin rasboras, otocinclus, Amano shrimp, nerite snails - **Avoid:** Bettas, fancy long-finned guppies, large cichlids, larger danios (giant), goldfish - **Lifespan:** 3-5 years - **Difficulty:** Beginner-Intermediate (best in seasoned tanks 3+ months old) ## Frequently Asked Questions ### Are Glowlight Danios aggressive? Glowlight Danios are generally peaceful but highly energetic. In groups smaller than six, they may display hierarchical nipping or chase slower tank mates. Keeping them in a school of 8-10 individuals disperses this energy, making them excellent community inhabitants for active nano tanks. ### What is the minimum tank size for Glowlight Danios? While they only reach about 1.25-1.5 inches, Glowlight Danios are incredibly active horizontal swimmers. A 10-gallon long tank is the practical minimum for a school of six, but a 20-gallon long (30 inches wide) is highly recommended to allow for their natural sprinting behavior and to maintain stable water parameters. ### Do Glowlight Danios need a heater? Yes. Unlike the cool-tolerant Zebra Danio, the Glowlight Danio hails from warmer regions of northern Myanmar and thrives best in a stable tropical range between 72°F and 78°F. Use a reliable aquarium heater to prevent the temperature swings that stress the species more than any specific number on the dial. ### What do Glowlight Danios eat? They are omnivorous micro-predators. Feed a base of high-quality crushed flakes or micro-pellets, and supplement 2-3 times per week with live or frozen foods like daphnia, cyclops, or baby brine shrimp. Frequent live feedings deepen the iridescent orange and gold tones along their flanks. ### Are Glowlight Danios the same as GloFish? No. Glowlight Danios (Danio choprae) are a naturally occurring species from Myanmar with iridescent body color produced by light refracting off their scales. GloFish are genetically modified Zebra Danios (Danio rerio) with an inserted fluorescent protein gene. Different species, different origin, different appearance under blue light. ### Are Glowlight Danios hardy? Glowlight Danios are moderately hardy once acclimated, but they are sensitive to high nitrate levels and fluctuations in water chemistry. They perform best in well-established, seasoned aquariums with consistent weekly water changes and high dissolved oxygen levels. New tanks under three months old often stress them out. --- *Source: [FishStores.org](https://www.fishstores.org/species/glowlight-danio)* *Last updated: April 24, 2026*