6 × Neon Green Rasboras (Microdevario kubotai)

This listing supplies six Neon Green Rasboras (Microdevario kubotai) as one pack. They are social fish; plan to build the group to at least eight to ten compatible individuals in a suitable mature aquarium.

These tiny, peaceful rasboras are at their best in a group: they settle faster, shoal more tightly and show their brightest yellow-green colour in a planted aquarium.

The Neon Green Rasbora, Microdevario kubotai, is one of the smallest fish in the hobby, but it creates one of the biggest visual effects in a planted aquarium. At barely 2.5 cm as an adult, this bright shoaling cyprinid flashes electric yellow-green through the middle of the tank and instantly draws the eye. Its tiny size, peaceful behaviour and vivid yellow-green colour make it especially effective against dark plants and wood.

Native to Southeast Asia, especially parts of Thailand and Myanmar, Neon Green Rasboras are ideal for a calm community aquarium. Their neon green rasboras lifespan is usually around 3 years with stable care, and they are widely considered neon green rasboras for beginners as long as they are kept in a proper group. They are peaceful, active, and best displayed in a soft, well-planted layout with open swimming space. For fishkeepers asking how to care for neon green rasboras, this species rewards careful setup with constant movement, excellent community compatibility, and a lively midwater display that makes even a small tank feel full of life.

Where Do Neon Green Rasboras Come From? Natural Habitat Explained

The neon green rasboras habitat is made up of small streams, tributaries, and gently flowing freshwater systems in Thailand and Myanmar. Reports place wild populations in Peninsular Thailand, including Ranong and nearby regions, as well as the Ataran basin in Myanmar. These waters are usually clear to lightly stained, warm but not hot, and often bordered by dense vegetation. In nature, the fish move through shallow areas with roots, submerged plants, leaf litter, and dappled sunlight.

That natural environment explains why neon green rasboras in planted tank layouts look so natural and behave so confidently. In the wild, they feed on tiny invertebrates, zooplankton, and fine organic matter suspended in the water column. They are not a bottom grazer and not a hard-hitting predator; instead, they are delicate midwater pickers that thrive where food is small and frequent. Broken light, dark wood, moss and fine-leaved stems can show their colour well.

In the hobby, this species is not known as a threatened fish in routine trade channels, but responsible sourcing still matters. Stable water and a mature aquarium are important for this small stream fish, especially after transport.

How to Set Up the Perfect Tank for Neon Green Rasboras

A proper neon green rasboras tank setup starts with understanding that these fish are tiny, active, and social. Their small size does not mean they should be squeezed into an unstable nano tank. The best neon green rasboras aquarium setup gives them room to shoal, stable water, and enough plant cover that they feel safe.

Tank Size Requirements

Use an aquarium with at least a 60 × 30 cm base and mature, stable water. This footprint is more important than a small litre figure for active shoaling. Keep at least eight to ten fish, and provide more space if adding another species. See the specialist species profile for the minimum footprint and group recommendation.

Water Parameters

The ideal neon green rasboras water parameters are straightforward: temperature 22-26°C, pH 6.0-7.5, and soft to moderately hard water. The best neon green rasboras temperature for daily care is around 23-25°C. If you prefer exact phrasing, the recommended neon green rasboras water temperature range is 22-26°C. For hardness, neon green rasboras water hardness should stay around 3-12 dGH. These are the neon green rasboras ideal conditions for colour, appetite, and steady activity.

Filtration

Neon green rasboras filtration needs are moderate. They appreciate clean, oxygen-rich water, but they do not enjoy being blasted around by excessive current. A small sponge filter or a gentle internal filter is ideal in nano systems. In planted tanks, a compact external or hang-on filter can work well if the outflow is softened with plants or directed along the glass. Stable filtration matters more than raw power. If you are upgrading a nano setup, pair them with a reliable heater and gentle filter rather than chasing high turnover.

For a simple species-focused layout, many keepers combine these rasboras with dark substrate, branch wood, and easy plants. In a larger peaceful display, add other species only when their water and group needs are independently met.

Substrate

A dark sand or fine gravel substrate is best. It reduces reflected glare, helps the fish feel secure, and increases contrast so the body glow looks stronger. Pale gravel can wash out the display. This is one case where aquascaping choices matter almost as much as water chemistry.

Plants & Decor

Neon green rasboras in planted tank layouts are especially impressive. Use fine-leaved stems, floating plants, mosses, and open midwater lanes. Java moss, Cryptocoryne, Limnophila, and floating Salvinia all work well. In a larger mature aquarium, adult Yellow Neon Shrimp may be suitable, though exposed shrimplets can be eaten.

Some aquascapers ask unusual lighting questions such as how much green light do plants absorb. In practice, aquarium plants use a broad spectrum, and your goal is not green-only lighting but balanced full-spectrum light that supports growth without blasting the fish. Moderate light for 6-8 hours is usually enough in a low-tech setup.

Lighting Requirements

Moderate lighting produces the best balance of plant growth and fish confidence. Under suitable lighting, its yellow-green body colour is especially visible against dark décor. Use floating plants if the fish seem shy.

What Do Neon Green Rasboras Eat? Complete Feeding Guide

The neon green rasboras diet is omnivorous, but size matters more than category. Their mouths are tiny, so food must be correspondingly small. In the wild they pick at micro-crustaceans, insect larvae, and suspended particles. In the aquarium, a good neon green rasboras feeding guide revolves around micro pellets, crushed flake, baby brine shrimp, daphnia, and finely sized frozen foods.

Staple Foods

Use a quality micro pellet or very fine crushed flake as the staple. Feed only what the shoal can finish in around 30-60 seconds. Because they feed in the midwater, slow-sinking foods are often better than heavy granules that drop too fast.

Supplemental Foods

For stronger colour and better body condition, rotate in baby brine shrimp, daphnia, cyclops, and finely chopped frozen foods. This is especially useful before spawning attempts. If you keep them in a mixed nano aquarium, note that they are peaceful pickers, not aggressive feeders.

Treats, Shrimp Safety & Portion Control

Offer small portions once or twice daily. Adult dwarf shrimp may coexist, but exposed shrimplets can be eaten; provide moss and cover if keeping both.

Neon Green Rasboras Appearance: Colors, Patterns & Varieties

The adult neon green rasboras size is usually around 2-2.5 cm, though some specimens may approach 3 cm in ideal conditions. The body is slim and streamlined, built for constant midwater movement. Fins are delicate and mostly transparent, which makes the body colour appear even brighter.

The main attraction is the luminous green-yellow body stripe and overall glow. Under balanced aquarium lighting, its yellow-green body can appear almost luminous against dark plants. Colour varies with individual condition and the lighting setup.

Neon green rasboras male vs female differences are subtle. Males are often slimmer and may show slightly stronger colour when settled. Females are usually a little fuller-bodied, especially when carrying eggs. There are no dramatic long-fin or colour morph variants in standard trade lines, so healthy condition matters more than chasing named forms.

To intensify colour, use dark substrate, green plants, and a calm group of at least 8-10 fish. The gallery is representative; individual fish may differ in colour intensity and size.

What Fish Can Live With Neon Green Rasboras? Compatibility Guide

Neon green rasboras behaviour is peaceful, social, and non-territorial. They are among the best rasbora for community tank setups when the tank is calm and companions are appropriately small. If you are researching neon green rasboras compatible fish or neon green rasboras tank mates, the key rule is simple: choose species that will not outcompete, intimidate, or eat them.

Ideal Tank Mates

Excellent companions include other tiny rasboras, dwarf shrimp, Otocinclus, and peaceful nano tetras. In larger planted community aquariums, they also combine well visually with Green Neon Tetras and can complement the brighter golden tones of Neon Tetra. For invertebrate-friendly displays, Yellow Neon Shrimp make a particularly attractive match because they occupy different zones and do not disturb the shoal.

Avoid assuming a larger or more assertive fish will be safe with this tiny shoal. Bettas vary by individual and may harass small rasboras; guppies may need different water and can outcompete them at feeding time.

How Many Should Be Kept Together?

Because they are schooling fish, one of the most important compatibility questions is really social structure: Keep at least 8 Neon Green Rasboras, and 10-15 is even better if space allows. A proper group reduces stress, sharpens colour, and spreads attention naturally across the shoal. That is the best answer to neon green rasboras with other fish: first make sure they are secure with their own kind.

Species to Avoid

Avoid large gouramis, angelfish, bigger barbs, most cichlids, and any fish with a strong predatory mouth. Even if they are not outright aggressive, larger fish can stop these rasboras from feeding properly. The principal compatibility risk is intimidation or predation by unsuitable companions.

Compatibility with Invertebrates

Adult shrimp and snails are usually safe. Newly hatched shrimplets may be eaten if exposed, so dense moss is helpful. For a colourful nano display, many keepers combine a shoal of Neon Green Rasboras with Yellow Neon Shrimp and Otocinclus in a planted tank.

How to Breed Neon Green Rasboras: Complete Breeding Guide

Neon green rasboras breeding is possible in captivity, but it is usually classed as moderate rather than easy. The fish are egg scatterers, and adults may eat eggs if left in the spawning tank. If you want reliable results, use a separate breeding setup.

Breeding Setup

Start with a small dedicated tank of 20-30 litres, soft slightly acidic water, and fine plants or spawning mops. Keep temperature around 24-26°C and feed live or frozen conditioning foods for 1-2 weeks. A dimly lit setup with a mesh, marbles, or dense moss on the base helps protect eggs from hungry adults.

Male vs Female and Spawning Behaviour

Males can appear slimmer and more intensely coloured, while females may look rounder when carrying eggs. These visual differences do not make the six-fish pack sexed.

Egg Care & Hatching

Once spawning is complete, remove the adults. Eggs are tiny and usually hatch within 24-48 hours depending on temperature. Fry become free-swimming shortly after and need infusoria, liquid fry food, or other microscopic first foods before graduating to baby brine shrimp.

Fry Care & Challenges

The biggest challenge is size. Fry are extremely small, so first foods must be tiny and water quality must stay pristine. Gentle aeration and small daily water changes help. Growth is steady but not especially fast. The best breeding results come from mature, plant-rich systems rather than sterile boxes.

Neon Green Rasboras vs Similar Species: Which Should You Choose?

Small glowing fish are often compared side by side, especially by aquarists choosing between rasboras and tiny tetras. If you are deciding whether this is the right fish for your tank, compare its size, group behaviour, and visual effect rather than colour alone.

Choose Neon Green Rasboras if you want a very small fish with constant motion and a bright, almost fluorescent green tone. Choose Green Neon Tetras if you prefer a slightly deeper-bodied tetra look and warmer, softer blackwater conditions. Choose Neon Tetra if you want a similar small schooling fish with a more golden presentation. For many aquarists, this species remains the best rasbora for community tank layouts where space is limited but visual impact matters.

Common Health Problems in Neon Green Rasboras & How to Prevent Them

Good neon green rasboras health starts with stability. Because these fish are tiny, they are sensitive to sudden parameter swings, poor acclimation, and under-filtered nano tanks. A healthy fish should show clear eyes, a slim but not pinched body, steady midwater swimming, strong shoaling response, and bright colour.

Common Diseases & Symptoms

The most common neon green rasboras diseases in home aquaria are stress-related bacterial issues, ich, and wasting caused by chronic underfeeding or internal parasites. Symptoms include clamped fins, faded colour, hanging near the surface, isolation from the shoal, or visible white spots. Because they are so small, problems escalate quickly.

Treatment & Prevention

Treatment should begin with water testing and isolation where possible. Warm, clean, well-oxygenated water and daily observation matter more than random medication. Quarantine all new fish, feed a varied micro diet, and avoid overcrowding. If these fish share a shrimp tank, remember that medication choice matters.

Understanding Neon Green Rasboras Behavior in the Aquarium

Neon green rasboras behaviour is one of the species' best features. They are active in daylight, spend most of their time in the middle of the tank, and constantly interact with one another. They are not true tight-schooling fish every second of the day, but they do shoal closely when startled and spread out slightly when relaxed.

This species is at its best in a proper group. A lone fish or pair becomes nervous and washed out, while a group of 10 or more shows far better confidence. If you are researching how to care for neon green rasboras, group size is one of the most important answers. The fish use numbers as security.

In a mature planted aquarium, you will often see short bursts of chasing, loose alignment in open water, and quick feeding dashes. None of this is aggression; it is normal social movement. Their calm nature is a big reason they are considered neon green rasboras for beginners and a strong choice for peaceful nano communities.

Why Choose from Tropical Fish Co?

Before ordering this six-fish pack, prepare a mature, covered aquarium and plan the remaining group to reach at least eight to ten. Tiny fish need careful acclimation, stable water and appropriately small food.

When comparing Neon Green Rasbora (Microdevario kubotai) with similar livestock, focus on clear identification, settled feeding, accurate care guidance, careful packing and a realistic match for your aquarium. Those details matter far more than a low headline price, especially with specialist species.

Related fish and care

Explore the Rasboras & Danios collection for other small shoaling fish. Check each species' water needs and group size before mixing them.