The sparkling gourami is one of the smallest gouramis in the hobby, a labyrinth fish barely 3.5-4cm long from the still ditches, marshes, and rice paddies of Southeast Asia — the Mekong and Chao Phraya basins and the Malay Peninsula.
A brownish body spangled with rows of iridescent blue-green spots, red-and-blue-edged fins, and brilliant turquoise eyes give it its name.
Its party trick is real sound: displaying fish produce an audible croaking or clicking by snapping enhanced tendons in the pectoral fins, and a settled group will chatter at each other across the tank.
Do not confuse it with the closely related croaking gourami, Trichopsis vittata, which grows to nearly twice the length, or with the honey and dwarf gouramis already familiar to community keepers, both of which are bigger, bolder fish.
This is a true nano species for a quiet, planted, dedicated setup.
The intermediate rating is not about fragile health, because they are reasonably hardy; it reflects that they starve, hide, and fade in the average busy community tank, and only show their colour, confidence, and voice when the whole aquarium is designed around them.
Housing
House a small group of five or six in a tank of at least 40L (about 10 US gallons, a base of roughly 45x30cm) as a working minimum, prioritising floor area and planted cover over height.
Dense stem plants, leaf litter, and a layer of floating plants recreate the shaded, tannin-stained still water they come from and transform their behaviour.
Keep the water at 24-28C (75-82F), soft and slightly acidic to neutral with a pH around 6.0-7.5, and use gentle filtration such as a sponge filter, because flow that barely registers for other fish will pin these into the corners.
Like all gouramis they gulp air at the surface with a labyrinth organ, so fit a tight lid that traps a layer of warm, humid air; cold room air over warm water is a classic way keepers damage them.
Cycle the tank fully before they arrive and keep ammonia and nitrite at zero, with a weekly partial water change.
Labyrinth fish will jump through equipment gaps, so close off cable cutouts in the lid.
Diet
Sparkling gouramis are micropredators that hunt tiny invertebrates in the wild, and their mouths are genuinely small, so standard flake and community pellets are often literally too big.
Use crushed flake or true micro-pellets as the staple and expect some individuals to refuse dry food entirely at first.
Condition and colour come from small live and frozen foods: daphnia, baby brine shrimp, microworms, cyclops, and finely chopped bloodworm.
A tank with leaf litter and mature plants also grows the microfauna they graze between meals.
Feed small amounts once or twice daily and watch that every fish actually eats, because they are slow, deliberate feeders that lose out to anything quicker.
Slow starvation next to faster tankmates is one of the most common ways this species fails.
Health
This is a fairly robust little fish with no strong link to the iridovirus that plagues farmed dwarf gouramis, which makes sourcing less fraught than for that species.
Most losses trace back to husbandry: chilled surface air, strong flow, poor water quality, or simply being outcompeted for food.
Quarantine new arrivals for a few weeks, since wild-caught and farm imports can carry parasites, and internal worms show as a hollow belly despite eating.
Watch for clamped fins, faded spangling, and constant hiding as early stress signals in a fish that should be out patrolling the plants.
At this size a healthy lifespan is around 3-5 years, and stable temperature, clean water, and a low-stress tank are what get them there.
There is little margin for error in medicating a fish this small, so prevention beats treatment.
Temperament
Sparkling gouramis are peaceful, inquisitive, and endearingly interactive with each other, but they are timid with anything larger or faster than themselves.
Keep them in a group of five or six or more, because lone fish tend to stay hidden while a settled group spreads confidence and triggers the croaking displays the species is known for.
Males spar with spread fins and audible clicks, circling each other in brief, theatrical contests that almost never cause damage in a planted tank.
Males also build small bubble nests, often tucked under a broad leaf rather than in open water.
The safest stocking is a species tank, or company on their own scale: chili rasboras, ember tetras, pygmy corydoras, and otocinclus work well, while barbs, bettas, larger gouramis, and anything boisterous will bully or simply out-eat them.
They may pick off shrimplets but generally coexist with adult cherry shrimp.
A good fit for
Keepers who want a characterful centrepiece for a planted nano tank
Anyone charmed by the idea of a fish that audibly croaks
Quiet species tanks or nano communities of equally small fish
Keepers ready to feed live and frozen micro-foods
Fans of natural, tannin-stained, leaf-litter aquascapes
Common mistakes to avoid
Adding them to a busy community where they hide and slowly starve
Standard flake and pellets being too large for their tiny mouths
Strong filter flow pinning them into corners
Cold room air over the surface harming the labyrinth organ
Keeping them alone or in too small a group, which leaves them shy and colourless
Intermediate
Beginner
Beginner
Intermediate
Intermediate
Intermediate