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Pearl Gourami
Freshwater Fish · Gouramis

Pearl Gourami

Trichopodus leerii

Lace-patterned, peaceful centrepiece gouramiBeginner

Lifespan
4-6 years
Size
4-4.5 in
Social needs
Group of 4-6 with one male; or a single fish
Time
10-15 min daily; weekly water change
Cost
Medium
Diet
Omnivore (flake, pellet, frozen foods)

Overview

What is this animal?

  • The pearl gourami is widely considered the most beautiful and best-behaved of the larger gouramis, dressed in white spangles over bronze with a black lateral line.
  • Mature males add a flame-orange throat.
  • It is hardy, peaceful, and forgiving: a genuinely beginner-suitable centrepiece fish for a planted community, provided the tank is large and calm enough for it.

Temperament

  • Among the gentlest large gouramis, pearls glide through the midwater and explore plants with their touch-sensitive feelers.
  • They are shy in bare tanks and confident in planted ones.
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  • Pair them with peaceful tetras, rasboras, corydoras, and similar; avoid barbs and other nippers.
  • Males build bubble nests and display beautifully at breeding time.

A good fit for

  • A first centrepiece fish for a planted community
  • Keepers wanting calm, graceful tank presence
  • Communities of peaceful mid-sized fish
  • Beginners ready for a 63 gal+ aquarium at least 4 ft long

Common mistakes to avoid

  • Housing with fin-nippers that shred the feelers
  • Two males sparring in mid-sized tanks
  • Strong flow and choppy surfaces stressing them
  • Tanks under 63 gal, or shorter than 47 in, cramping adults

Enclosure

Minimum 63 gallons

Fine alone or with company. Group of 4-6 with one male; or a single fish

  • Provide at least 63 US gallons in a tank at least 4 ft long, which Practical Fishkeeping asks for this 4.5 in fish: a standard 75-gallon tank qualifies, and a 55-gallon falls short on volume.
  • The same tank suits one fish or a group of four to six.
  • Give it gentle flow, dense edge planting, and some floating cover; like all gouramis they are labyrinth breathers that sip air at a calm surface.
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  • Keep the water at 75-82°F.
  • Keep one male with a group of females, or a single fish in a community; two males will spar over territory in average tanks.
  • Soft to moderately hard, slightly acidic to neutral water suits them, though tank-bred fish adapt widely.

Check your enclosure

Supplies

Setup

  • Tank and stand
  • Filter
  • Heater and thermometer
  • Substrate, plants and decor
  • Liquid test kit
  • Dechlorinator and starter supplies

Ongoing

  • Quality tropical flake (crushed fine for sparkling and honey gouramis)
  • Floating and slow-sinking micro-pellets
  • Frozen bloodworm, brine shrimp and daphnia
  • Frozen or live baby brine shrimp, cyclops or microworms (for sparkling gouramis)
  • Spirulina or vegetable flake
  • Fine net for removing leftovers

Safe substrate: Fine, smooth sand · Smooth, rounded fine gravel (not for loaches or sand-sifting cichlids; sand is better for corydoras) · Bare bottom (quarantine and grow-out only)

Work out the cost

Care routine

Daily

  • Check temperature and equipment
  • Feed
  • Head-count and look everyone over

Every few days

  • Check the air layer above the waterevery 3 days
  • Top up evaporationevery 3 days
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Weekly

  • Test the water
  • Water change and gravel vacuum
  • Wipe the front glass only

Every few weeks

  • Trim and thin the plantsevery 2 weeks

Monthly

  • Check supplies and reagent dates
  • Replace or recharge chemical media, if you use any (skip it in a blackwater tank)
  • Rinse the filter media

Health review: Quarterly review with a surface-air check, every 3 months

Tools

Is your enclosure big enough?Check your measurements against the recommended sizeWhat will it cost?Setup, monthly and over its whole life, itemisedIs this ammonia reading dangerous?Works out the toxic part from your pH and temperature

Care in depth

Diet

Omnivore (flake, pellet, frozen foods)
  • Pearl gouramis accept everything: quality flake or small pellets as the staple, rotated with frozen or live brine shrimp, daphnia, and bloodworm.
  • Some vegetable matter or spirulina rounds the diet out.
  • Feed once or twice daily only what is eaten within a couple of minutes.
  • They are deliberate, polite feeders, so check they are not outcompeted by faster tankmates.

Health

Signs of good health, and the common problems
  • This is a robust species; most problems arrive with poor water quality or aggressive tankmates rather than disease susceptibility.
  • Standard quarantine of new arrivals covers the rest.
  • Watch the long, thread-like ventral feelers: fin-nipping species shred them, which is a welfare problem and an infection route.
  • Stable temperature and a calm surface keep the labyrinth organ happy.

Is this urgent?

6 warning signs and how fast to act, 3 of them right away

In a fish tank the patient is usually the water. Test before you treat: dosing a healthy tank for a disease it does not have makes things worse.

Go now

Any detectable ammonia or nitrite in a stocked tankLarge water change now with dechlorinated, temperature-matched water. Stop feeding. Test again in 12 hours. Both are directly toxic. How toxic the ammonia reading is depends on pH and temperature, so the same number can be harmless or lethal.
Now
Fish gasping at the surface with fast gill movement, or crowding the filter outflowIncrease surface movement now (gently in a betta or gourami tank, without creating a strong current), then test the water. Either the oxygen has crashed or the gills are being chemically burned. Both are hours-scale problems. Bettas, gouramis and corydoras rise to gulp air as part of normal breathing; the warning is constant gulping, fast gill movement, or the whole group hanging at the top.
Now
Sudden deaths, more than one fish in a dayTest ammonia, nitrite, nitrate and temperature before doing anything else. Do not add medication yet. Multiple simultaneous deaths usually point at the water or the equipment rather than a pathogen, so rule those out first.
Now

Today

Flashing: repeatedly scraping against decor or substrateTest the water, then look closely for parasites. Irritation is either chemical or parasitic; the test tells you which before you medicate.
Today
White salt-grain spots over the body and finsBegin the appropriate treatment today and check the temperature. The parasite's life cycle is temperature-driven, and it multiplies with every cycle you wait.
Today

Soon

Clamped fins, hiding, or refusing food for more than two daysTest the water and review recent changes. Usually the earliest visible sign of a parameter drifting.
A few days

Never add a new fish to a tank that is not fully cycled, and never treat blind. A test kit is cheaper than the fish.

This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it, and the time to find one is before you need one.

Bedding and substrate

3 safe, 4 with a caveat, 2 to avoid

Substrate in an aquarium is a filter as much as a floor. Most of the biology lives in and on it.

Safe

Fine, smooth sandCorrect for corydoras, kuhli loaches, eartheaters such as rams and acaras, and anything else that sifts or burrows. Barbels wear away on sharp gravel.
safe
Smooth, rounded fine gravel (not for loaches or sand-sifting cichlids; sand is better for corydoras)Rinse thoroughly before use. Grain size should be too large to swallow and too small to trap food. Kuhli loaches need sand to burrow into and rams and acaras sift mouthfuls of it; bronze and panda corydoras manage on smooth fine gravel, but sterbai corydoras need sand.
safe
Bare bottom (quarantine and grow-out only)Legitimate for quarantine and grow-out tanks. Easy to clean, but it holds far less biological filtration, and it is no long-term home for burrowing loaches or sand-sifters.
safe

With a caveat

Crushed coral or aragoniteDeliberately raises hardness and pH. Correct for rift-lake cichlids, wrong for soft-water species.
with a caveat
Aquasoil for planted tanksExcellent for plants, but most active soils soften the water and pull pH and KH down for months, and many leach ammonia for the first weeks. Right for soft-water species; wrong for hard-water animals (livebearers, rainbowfish, goldfish, and snails, whose shells erode in soft, acidic water) unless you test GH and KH and remineralise. Cycle around it; do not stock into it.
with a caveat
Very deep sand bedsAnaerobic pockets form below about 2 inches in still sand. Either keep it shallow or keep it stirred.
with a caveat
Painted or coated gravelUsually fine, but coatings chip. Test a handful in a jar for a week first.
with a caveat

Never

Sharp or angular gravel with bottom-dwellersWears down barbels and leads to infection in corydoras and loaches.
never
Anything containing metal, limestone of unknown origin, or shells in a soft-water tankSlowly alters chemistry in ways that are hard to diagnose later.
never

This is our general list for freshwater fish. We have not built one specific to Gouramis yet.

Top resources for more info

Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-10-22.

YouTubers

Girl Talks FishCare how-tos by fish type, tank setup and beginner mistakes (the host works for Aquarium Co-Op, a retailer)Aquarium Co-OpSpecies care guides, filtration and fish health (run by a retailer)Prime Time AquaticsSpecies profiles, stocking and water chemistry explained plainly

Sites

Keep going

Gouramis, side by side

Same axes, same care guides: the honest way to choose between types.

See all Gouramis side by side →Compare with other animals

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Colourful labyrinth fish prone to farmed-stock disease

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Gentle golden labyrinth fish, beginner-friendly

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Sparkling Gourami
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The thumb-sized gourami you can actually hear

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Long-finned Betta
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Flowing-finned labyrinth fish that lives alone

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Short-finned Betta
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The short-finned plakat: an athletic betta that lives alone

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Guppy
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Colourful livebearer that breeds readily

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Is your enclosure big enough?

These are the smallest sizes that give good conditions, not legal minimums. More room is always better.

Minimum 63 gallons

Every figure, and where it comes from

63 gallons and 47 in suits one pearl gourami or a group of four to six. Practical Fishkeeping asks for a tank at least 47 in long for this 4.5 in fish, and Austria's legal minimum for the species is its 47 x 16 x 20 in (63 gallons) size class; the welfare-led sources ask for less water for one fish, and this site sets its volume at that legal minimum because good conditions are never less than a law requires.

Minimum volume63 gallons
Swimming length47 in minimum. A tall tank of the right volume is still the wrong shape.
CompanyFine alone or with company. Group of 4-6 with one male; or a single fish
The recognised standards do not agree on this one
Practical Fishkeeping (UK): At least 48 in long for this 4.5 in fish; two males and four females make a good start in a 47-inch tank. The length this site uses. Checked 2026-10-23.
Austria, 2. Tierhaltungsverordnung, Anlage 5: Aquarium size class 47 in (47 x 16 x 20 in, 63 gallons) for adults. A legal minimum, and the volume this site uses. Checked 2026-10-23.
Aquarium Co-op (US): 29 US gal for one, and 55-75 US gal for a group. Less for one fish; in line for a group. Checked 2026-10-23.
Seriously Fish: A base of 36 x 12 in, about 21 gallons. Less than the figure used here. Checked 2026-10-23.

What it really costs

Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.

My kit says 0.25 ppm. Is that dangerous?

A liquid kit measures total ammonia, but only the un-ionised fraction is really toxic, and that fraction is governed by pH and temperature. Each whole pH unit multiplies it roughly tenfold. So the same reading can be nearly harmless in one tank and lethal in another; this works out which one you are in.