Gourami – Pearl Gourami – Trichopodus leerii

The pearl gourami, scientifically known as Trichopodus leerii, is one of the most elegant and rewarding labyrinth fish available to aquarists. Its delicate body pattern, peaceful temperament and interesting breathing behavior make it an ideal choice both for beginners and experienced hobbyists. In this article, we will explore its natural environment, care requirements and practical tips for creating a suitable home, including equipment and aquariums you can find at MB Store.

Origin, appearance and natural behavior of the pearl gourami

The pearl gourami comes from Southeast Asia, especially from the lowland areas of Malaysia, Thailand and parts of Indonesia. In the wild, it inhabits slow-flowing rivers, flooded forests and peat swamps rich in organic matter. The water there is usually soft, slightly acidic and tinted brown by tannins from decaying leaves and wood.

Its common name, pearl gourami, reflects its unique coloration. The body is covered with a pattern of small, light spots resembling scattered pearls on a silver-brown background. A distinct dark stripe runs horizontally from the mouth through the eye to the base of the tail fin. Adult males develop an intense orange to reddish coloration on the chest and throat, especially during the breeding season, and their dorsal fins become longer and more pointed than those of females.

The body shape is slender and laterally compressed, giving the fish a graceful, elongated silhouette. The ventral fins are transformed into long, thread-like filaments which serve as tactile organs. Pearl gouramis use these filaments almost like fingers, gently touching plants, objects and even other fish to explore their environment.

This species belongs to the labyrinth fish group. Above the gills, pearl gouramis have a specialized organ called the labyrinth that allows them to breathe atmospheric air. You can often observe them slowly swimming to the surface to take a gulp of air. Because of this, they are highly adaptable and can survive in waters with low oxygen levels where other fish would struggle, but an aquarium environment should still provide good filtration and aeration for long-term health.

In terms of behavior, Trichopodus leerii is known for its calm and peaceful disposition. It is a shy fish, especially when first introduced into a new aquarium. It appreciates dense vegetation, floating plants and areas of shade that give it a sense of security. When kept in appropriate conditions, it moves slowly and gracefully through the water column, often occupying the middle and upper levels of the tank.

Recommended aquarium and equipment for Trichopodus leerii

Proper housing is essential to bring out the natural beauty and health of pearl gouramis. While this species is not particularly large, reaching around 10–12 cm in length, it needs enough space to swim and establish territories. For a small group of three to four individuals, an aquarium of at least 100–120 liters is recommended. A longer tank is preferable to a tall one, as it gives the fish more horizontal swimming space.

At MB Store you can choose from a wide selection of aquariums, stands and covers that provide a stable base for such a setup. When selecting a tank, ensure that the top is covered with a lid or glass. Because pearl gouramis breathe air, there should be a warm, humid layer of air between the water surface and the cover to prevent damage to the labyrinth organ caused by cold drafts.

Filtration should be efficient but not too strong. In nature, pearl gouramis inhabit slow or standing waters, so they dislike strong currents. A good internal or external filter, equipped with mechanical, biological and optionally chemical filtration, will keep the water clean and stable. At MB Store, you can find a range of filters suitable for differently sized community tanks, including models with adjustable flow that are perfect for labyrinth fish.

Lighting intensity can be moderate. These fish feel most comfortable in soft, diffused light. Strong lighting can be tempered by using floating plants or taller background vegetation. Modern LED systems offered by MB Store allow you to adjust intensity and color temperature, which helps to replicate natural daylight conditions and support plant growth while keeping your fish comfortable.

A heater is necessary to maintain stable water temperature. Pearl gouramis are tropical fish and prefer temperatures between 24 and 28 °C. Fluctuations can stress them and lead to disease. A reliable, adjustable heater combined with a precise thermometer will help you maintain these parameters. MB Store’s range of heaters includes models with integrated thermostats and protective covers, which are especially useful in community tanks.

When choosing substrate and decorations, focus on creating a natural-looking environment. A dark sand or fine gravel substrate helps to intensify the vivid coloration of the fish. Add driftwood, roots and rocks to form hiding places and break the line of sight. Live plants such as Java fern, Cryptocoryne species, and various stem plants create dense vegetation where shy fish can retreat. Floating plants like Salvinia or Amazon frogbit provide shade and a calm surface, which pearl gouramis appreciate, especially when they are ready to build bubble nests.

MB Store also offers a wide selection of accessories such as nets, cleaning tools, water conditioners and test kits. These items are essential for regular maintenance, water change routines and monitoring of key parameters such as pH, hardness and nitrogen compounds.

Water parameters, diet and daily care

Although pearl gouramis are relatively adaptable, they show their best coloration and behavior when kept in water conditions similar to their natural habitat. Soft to moderately hard water is ideal, with a general hardness (GH) of 3–12 dGH and a carbonate hardness (KH) of 2–8 dKH. The pH should be slightly acidic to neutral, typically 6.0–7.5. Gentle variations are tolerated, but sudden changes must be avoided.

The nitrogen cycle in the aquarium must be fully established before introducing Trichopodus leerii. Ammonia and nitrite should always remain at 0 mg/l, while nitrate should be kept under 20–30 mg/l through regular partial water changes. Using high-quality filtration media and performing weekly water changes of 20–30% are basic principles of stable maintenance. At MB Store, you can find both biological media and water conditioners that neutralize chlorine and heavy metals in tap water.

Feeding pearl gouramis is not difficult, but a balanced diet is crucial to maintain their health and vivid colors. They are omnivores and accept a wide variety of foods. A staple can consist of quality dry flakes or small granules designed for tropical fish, which should contain both plant and animal proteins. To enhance coloration and vitality, supplement their menu with frozen or live foods such as daphnia, brine shrimp or bloodworms. These foods encourage natural foraging behavior and stimulation.

Vegetable-based foods also play an important role. Pearl gouramis willingly nibble on spirulina-based flakes and blanched vegetables such as spinach or zucchini slices. A varied diet supports good digestion, strong immunity and optimal growth. It is better to feed small portions several times a day than to give one large meal. Uneaten food should be removed after a few minutes to avoid pollution and subsequent increase of nitrate and phosphate levels.

Regular observation is a key element of daily care. A healthy pearl gourami has clear eyes, intact fins, full colors and smooth, even breathing. It should swim calmly, seek food eagerly and show no signs of abnormal scratching or rapid gill movement. When you notice changes in behavior, appetite or appearance, check water parameters first. Many health issues originate from poor water quality or stress caused by inadequate conditions.

Maintenance tasks include weekly glass cleaning, substrate siphoning, filter rinsing (in aquarium water to protect beneficial bacteria), trimming of plants and checking equipment functionality. MB Store provides practical cleaning tools such as algae scrapers and siphons that simplify these activities. Monitoring and maintaining a stable environment is the best prevention against diseases.

Social behavior and compatible tankmates

Pearl gouramis are generally peaceful and good candidates for community aquariums. However, their shy nature requires choosing tankmates carefully. Fast, aggressive or fin-nipping species such as many barbs or some larger cichlids can stress them, leading to color loss and hiding behavior. Instead, they should be combined with other calm, similar-sized fish that inhabit different zones of the aquarium.

Good companions include small to medium-sized tetras, peaceful rasboras, Corydoras catfish and small loaches that occupy the bottom. Livebearers such as guppies and platies may also be suitable, provided they do not harass the gouramis. When selecting co-inhabitants, it is important to consider similar water parameter requirements and temperaments. Overcrowding must be avoided, as it increases competition and stress.

Pearl gouramis feel best in small groups. Keeping a trio or more allows them to show natural interactions and reduces the pressure on individual fish. A common approach is to keep one male with two or three females. Males sometimes show mild displays toward each other, especially in smaller tanks, so it is safer to limit the number of males or provide a larger aquarium with many hiding spots and visual barriers.

Males in good condition often display their coloration and spread their fins proudly, especially when they see potential rivals or mates. These displays rarely lead to serious aggression when the tank is properly arranged and each fish has enough space. Observing these courtship behaviors is one of the most interesting aspects of keeping pearl gouramis.

Another aspect of social behavior is their interaction with humans. These fish can slowly become accustomed to the presence of their keeper and may start to approach the front glass during feeding times. Their calm movements and gentle nature make them particularly pleasant for aquarists who enjoy observing rather than high-energy action. Patience and a quiet environment around the aquarium help shy individuals gain confidence.

In tanks with several gouramis and other species, it is essential to control feeding so that all fish receive their share. Floating foods are easily accessible for pearl gouramis that often stay near the surface, while sinking pellets and wafers ensure that bottom dwellers such as Corydoras are not neglected. A well-planned feeding strategy reduces competition and supports harmony in the aquarium.

Breeding pearl gouramis in the home aquarium

Breeding Trichopodus leerii is possible even for intermediate aquarists, especially those who are willing to provide a separate breeding tank. As labyrinth fish, pearl gouramis build bubble nests at the water surface, and their breeding behavior is fascinating to observe. A dedicated spawning aquarium of around 60–80 liters is usually sufficient for one pair.

In the breeding tank, water level is often kept lower than in a community setup, around 15–20 cm. This makes it easier for the male to construct and maintain the bubble nest. Use gentle filtration, such as a sponge filter, to avoid destroying the nest. The water temperature can be slightly higher than usual, around 27–28 °C, and the surface should be calm and partly covered with floating plants. Dim lighting and dense planting help reduce stress.

To condition the breeding pair, feed them a rich diet containing live and frozen foods for several weeks. A well-conditioned male usually shows intense colors and begins to build a bubble nest under floating plants or even under large leaves at the surface. The nest consists of air bubbles covered with mucus, forming a stable platform for the eggs.

When the female is ready to spawn, she will approach the nest. The male wraps his body around her in a characteristic embrace, during which eggs and sperm are released. The fertilized eggs float upwards and the male carefully collects them into the nest. This behavior repeats several times until hundreds of eggs are deposited. After spawning, the male takes on the role of caretaker, guarding the nest and returning any falling eggs back to it.

At this stage, it is recommended to remove the female from the breeding tank, as the male may become aggressive toward her while he guards the eggs. The eggs typically hatch within 24–36 hours, depending on temperature. The fry remain in the nest for a few more days, feeding from their yolk sacs. Once they become free-swimming, the male should also be removed to avoid the risk of predation.

Raising fry requires very fine foods at first. Newly hatched brine shrimp, infusoria and commercial liquid fry foods are suitable options. As the fry grow, they can gradually be introduced to crushed dry food. Regular small water changes and close monitoring of water quality are essential, as fry are sensitive to poor conditions. Successful breeding provides not only a sense of achievement but also a deeper understanding of the life cycle of these captivating labyrinth fish.

Common health issues and how to prevent them

While pearl gouramis are robust, they are not immune to disease. Most health problems arise from poor water quality, stress, inadequate diet or improper social conditions. Prevention is always better than treatment, and maintaining a clean, well-balanced aquarium is the primary line of defense against illness.

One of the more common issues is fin rot, which manifests as frayed, disintegrating fin edges and often results from bacterial infection. It is often triggered by high levels of waste, fluctuating temperature or injuries caused by aggressive tankmates. Regular water changes, careful selection of co-inhabitants and the avoidance of sharp decorations help minimize this risk.

Another frequent condition in freshwater aquariums is ich, also known as white spot disease. It appears as small white cysts on the skin and fins, causing the fish to scratch against objects. Brought on by parasites, it usually occurs when fish are weakened by transport or sudden changes in water parameters. Quarantining new arrivals and monitoring temperature and pH are effective preventive strategies.

Stress-related health issues can also affect labyrinth fish. Because pearl gouramis breathe atmospheric air, they are sensitive to cold air above the water surface. Keeping the aquarium covered and ensuring that room temperature around the tank does not differ dramatically from water temperature protects the labyrinth organ. Long-term exposure to unsuitable air can weaken their resistance to disease.

An unbalanced diet may lead to digestive problems and weakened immunity. Overfeeding, especially with very fatty or low-quality foods, can cause bloating and accumulation of waste. Providing a varied diet with a balance of proteins, fats and vegetable components, as well as regular fasting days, helps keep the digestive system functioning properly.

When illness emerges despite careful maintenance, early detection is essential. Observing behavior, appetite, coloration and body condition allows you to notice the first symptoms. At the initial stage of disease, it is often enough to improve water quality and slightly adjust diet. In more serious cases, specific treatments can be used following manufacturer instructions and, if possible, professional advice. MB Store offers a selection of medications, water conditioners and test kits that support responsible and informed fish care.

Why Trichopodus leerii is a great choice for your aquarium

The pearl gourami is a unique combination of beauty, interesting biology and peaceful character. Its shimmering pattern and gentle swimming style instantly attract attention, yet it never dominates a community aquarium. For beginning aquarists willing to learn about water chemistry and basic maintenance, this species can serve as an introduction to the fascinating group of labyrinth fish.

For more experienced hobbyists, Trichopodus leerii offers the opportunity to create sophisticated, planted aquariums where subtle color interplay and natural behaviors take center stage. Observing bubble nest building, gentle social interactions and surface-breathing behavior deepens the appreciation for the complexity of freshwater ecosystems.

When planning a tank for pearl gouramis, high-quality equipment and a thoughtful layout are key to long-term success. MB Store supports aquarists at every stage, from choosing suitable aquarium dimensions to selecting appropriate filters, heaters, lighting and accessories. By combining reliable equipment with knowledge of the biological needs of your fish, you can create a stable, attractive environment that will delight both you and your aquatic inhabitants.

Ultimately, the success of keeping pearl gouramis depends on understanding that an aquarium is not just a container of water but a living, dynamic ecosystem. Stable water parameters, regular maintenance, balanced nutrition and careful social planning are the pillars that guarantee healthy, active fish. With these elements in place, the pearly shimmer of Trichopodus leerii will remain a highlight of your aquarium for many years.

FAQ – Pearl Gourami (Trichopodus leerii)

How big do pearl gouramis get and how long do they live?
Adult pearl gouramis usually reach 10–12 cm in length, with males being slightly larger and more colorful. In well-maintained aquariums with stable water parameters, suitable diet and low stress levels, they can live 5–7 years, sometimes even longer. Good filtration and regular water changes are essential for such longevity.

Can pearl gouramis live in a community tank?
Yes, pearl gouramis are peaceful and suitable for community tanks, provided they are kept with similarly calm species. Avoid aggressive or fin-nipping fish that may stress them. A planted aquarium with hiding spots and floating plants is ideal. Keep at least a small group and ensure enough space so each fish can establish its own territory.

What water parameters are best for Trichopodus leerii?
Pearl gouramis prefer soft to moderately hard water with a pH between 6.0 and 7.5. The optimal temperature range is 24–28 °C. Stability is more important than perfection, so avoid sudden changes. Regular testing of ammonia, nitrite and nitrate levels and weekly partial water changes will help maintain a healthy environment for long-term well-being.

What should I feed my pearl gouramis?
Offer a varied diet combining high-quality flakes or small granules with frozen or live foods such as daphnia, brine shrimp and bloodworms. Plant-based supplements like spirulina flakes and blanched vegetables improve digestion. Feed small amounts two to three times daily, remove leftovers and occasionally provide a fasting day to prevent obesity and water pollution.

Do pearl gouramis need special equipment?
They do not need highly specialized gear, but a covered aquarium with gentle filtration and reliable heating is essential. The cover keeps the air above the surface warm and humid, protecting the labyrinth organ. Moderate lighting and live plants enhance comfort. MB Store offers suitable aquariums, filters, heaters, lights and accessories tailored to community setups.