Gold Giant Gourami (Osphronemus goramy)

Decide whether the adult fish fits your long-term plan

The Gold Giant Gourami is the golden aquarium variety of Osphronemus goramy, a member of the gourami family Osphronemidae from Asia, probably including Sumatra, Borneo, Java, the Malay Peninsula, Thailand and Indochina. It suits a keeper prepared for a genuinely large labyrinth fish, powerful filtration and a purpose-built adult home. Its eventual size, waste output and space requirements should determine the decision before its dispatch size or colour does.

FishBase lists a maximum of 70 cm standard length for Osphronemus goramy. That is a maximum rather than a promised size for every individual, but it is the decisive planning reference for aquarium length, width, filtration and future handling. A home chosen around the selected 6 cm, 7 cm or 9 cm size would not meet the adult commitment.

What makes this a specialist-sized commitment

• The adult aquarium requires a base of at least 183 × 61 cm and around 681 litres as an absolute bare minimum.
• Powerful and efficient filtration is essential because the fish is exceptionally messy.
• Smaller fish may be eaten, while some adults may become very aggressive when space is inadequate.
• The fish needs access to atmospheric air through its labyrinth organ as well as clean, filtered water.

The species is associated with freshwater and brackish environments and has also been introduced to several countries for aquaculture. Base aquarium care on the adult dimensions and husbandry requirements set out here, without assuming where an individual fish was raised.

Browse the gouramis and labyrinth fish collection if the finished aquarium calls for a different scale of fish. Choose this giant species only when the large adult system is part of the plan from the beginning.

Choose the dispatch size without confusing it with adult size

One purchase supplies one Gold Giant Gourami in the size selected through the live size selector. The size choices are 6 cm, 7 cm and 9 cm, and each is a dispatch measurement rather than a forecast of how large that individual will become.

The size you select is the size supplied, not the adult size. Compare every size with the species maximum of 70 cm standard length and the adult aquarium requirement before choosing. Even the 9 cm size represents only a small fraction of the length used for long-term planning.

Read the offer in this order

1. Confirm that the adult aquarium can meet at least the 183 × 61 cm base and approximately 681-litre absolute minimum.
2. Confirm that filtration, heating and maintenance can be managed at adult scale.
3. Use the live selector to compare the 6 cm, 7 cm and 9 cm sizes.
4. Treat one selected quantity as one animal, not as a pair or pack.

Sex is guaranteed only when the selected option explicitly states male or female. This Gold Giant Gourami listing has no sex-guaranteed option.

The gallery images are representative of this type of animal rather than photographs of the exact animal supplied, so colours can look slightly different from the live animal.

Neither the dispatch measurement nor the gallery should be used to infer sex, age, origin or eventual temperament. Make the choice from the stated offer and the adult care commitment, then use the live selector for the size attached to the purchase.

Check the decisive adult, space and water numbers

Seriously Fish gives an adult base of 183 × 61 cm and about 681 litres as the absolute bare minimum, while stressing that a bigger aquarium is better. Its species profile uses 70 cm standard length and gives an aquarium range of 20–30°C, pH 6.5–8.0 and hardness 5–25 dGH.

A 6 cm fish would need to become more than eleven times that dispatch length to reach the 70 cm planning reference; a 9 cm fish would approach eight times its dispatch length. Those comparisons are not growth promises. They show why the size label cannot be used as the permanent-space specification.

Before committing, check the complete set of numbers together. A tank that reaches about 681 litres but falls short of the 183 × 61 cm base misses part of the stated minimum. Likewise, a correctly dimensioned aquarium still needs powerful filtration, suitable water and a routine capable of controlling the waste produced by a large adult.

Build the aquarium around adult length and usable space

The minimum adult plan combines a base of 183 × 61 cm with approximately 681 litres. Seriously Fish presents a 72 × 24 × 24 inch aquarium as the absolute bare minimum for an adult and says that bigger is better. In metric dimensions, 183 × 61 × 61 cm gives roughly 681 litres, showing how the footprint and volume belong to the same planning example.

Do not substitute height for the stated base. Adult length determines the need for a long aquarium, while the 61 cm minimum width provides the other part of the published footprint. If either base dimension falls short, a larger litre figure created mainly by extra height does not match the stated adult minimum.

Test a proposed aquarium in three steps

1. Check length: the adult base starts at 183 cm long.
2. Check width: the adult base starts at 61 cm wide.
3. Check volume: the species profile places the absolute bare minimum at about 681 litres and recommends more space.

Provide hiding places with robust large rocks and bogwood, as recommended in the species profile. Keep every structure stable enough for use around a powerful large fish and preserve the open area needed by the adult. Floating plants are preferable to delicate planting in this profile, although the gourami may eat them.

Plan the permanent aquarium before using a smaller system for the selected dispatch size. The adult footprint is the fixed reference; the time taken to reach it is not a safe basis for delaying the long-term setup.

Size filtration for the waste produced by an adult

Powerful and efficient filtration is essential because Seriously Fish describes this species as exceptionally messy. Choose filtration for the planned adult aquarium rather than the body size delivered with the order. A filter that appears adequate for a 6 cm fish can become the limiting part of the system as body mass, food intake and waste increase.

At the roughly 681-litre absolute minimum, the species profile uses a turnover of four to five times the aquarium volume each hour. Four turnovers equal about 2,724 litres per hour and five equal about 3,405 litres per hour. Its worked recommendation is two filters, each rated at 1,360–1,705 litres per hour, producing a combined nominal range of about 2,720–3,410 litres per hour.

Apply the filtration example to the finished aquarium

• Apply the four-to-five-times calculation to the actual adult aquarium volume.
• Treat the figures as filtration ratings for the stated setup, not as a replacement for water testing.
• Keep the filter running and check it for blockages as part of routine care.
• Maintain access to the surface even while providing circulation and filtration.

The RSPCA explains why a well-established biological filter is vital: fish release toxic ammonia, beneficial bacteria convert it to nitrite, and further bacteria convert nitrite to the safer nitrate. A labyrinth organ lets the gourami breathe atmospheric air, but it does not process dissolved waste.

Prepare and mature the filter before the fish enters the aquarium. Our guide to preparing and maturing a tropical aquarium explains the setup sequence. Do not use the Gold Giant Gourami to start the biological cycle.

Keep water inside the species range and waste targets

Maintain the aquarium within 20–30°C, pH 6.5–8.0 and 5–25 dGH. These are species aquarium values from the Seriously Fish profile and agree with the temperature and pH ranges listed by FishBase. Choose a stable point inside the range instead of moving between its extremes.

For dissolved waste, OATA's gourami and paradise fish sheet gives zero mg/l ammonia, zero mg/l nitrite and nitrate no more than 20 mg/l above the normal tap-water level as broad group guidance. It recommends testing at least weekly and changing 25% of the water at least once each week.

Use a measured weekly sequence

1. Test ammonia and nitrite and keep both at zero mg/l.
2. Compare aquarium nitrate with the normal tap-water nitrate level.
3. Carry out a 25% partial water change at least once a week.
4. Treat replacement tap water with conditioner to remove chlorine or chloramine.
5. Check the filter for blockages during the same maintenance session.

Use our aquarium water chemistry guide to understand what each test measures. After testing the aquarium, the water matcher can compare the measured values with the 20–30°C, pH 6.5–8.0 and 5–25 dGH ranges.

If filter media needs cleaning, OATA advises rinsing it lightly in aquarium water removed during a partial change rather than running it under the tap. This reduces losses of the beneficial bacteria established in the media.

Feed once a day without leaving waste behind

Osphronemus goramy is omnivorous and unfussy. FishBase records a wild diet containing plants and animals, including aquatic weeds, fish, frogs and earthworms. The species profile says it accepts pellets, frozen foods and vegetable matter and recommends a quality dried product with an algae-based food. Build the routine from those food categories rather than making one rich food the whole diet.

For frequency, OATA's wider gourami guidance recommends feeding once a day and giving only what the fish can eat within a few minutes. That schedule provides a clear stopping rule for pellets, granules, flakes, frozen food and vegetable matter. Portions must follow what is consumed within that short period rather than appetite at the glass.

Give each food a clear role

OATA also names small live or frozen items such as daphnia, small bloodworm and tubifex in its group feeding guidance. Use any such food as part of a varied routine, not as permission to exceed the once-daily, few-minutes limit.

Overfeeding leaves food to break down and release toxic waste. If material remains after the feeding period, remove it and reduce the next portion. Check that the fish still receives a varied combination rather than solving leftovers by eliminating whole food categories.

Respond to what happens at feeding time

• If everything is consumed well within a few minutes, keep watching body condition and water results before increasing the portion.
• If food remains, remove the excess and reduce the next measured feed.
• If interest in food falls, test water and assess the fish using the health-change checklist.
• If another fish prevents access to food, reassess compatibility rather than simply adding more food.

Arrange cover, surface access and heating for the full system

Provide hiding places with robust large rocks and bogwood while retaining the space required by an adult that may reach 70 cm standard length. The species profile prefers floating plants but warns that they may be eaten, so planting should not be the only source of cover or the feature on which the layout depends.

Gold Giant Gourami belongs to a family of anabantids with a specialised labyrinth organ that allows atmospheric breathing. Keep the water surface accessible. This adaptation does not reduce the need for powerful filtration, zero ammonia, zero nitrite and controlled nitrate.

Balance cover with access

• Use robust large rocks or bogwood to create hiding places.
• Preserve the adult footprint instead of filling the aquarium with excessive structure.
• Use floating plants only while the fish can still reach the surface.
• Expect floating vegetation to be eaten and maintain the layout accordingly.
• Keep filtration and surface access working together rather than treating air breathing as a substitute for water quality.

Heating must be calculated for the aquarium volume and room conditions. For the approximately 681-litre example, Seriously Fish estimates roughly 150–225 W spread across three heaters when the room is around 20°C. Recalculate for a different aquarium volume or room temperature.

Check temperature with the same regularity as the rest of the water values. A heater wattage is an equipment estimate; the measured aquarium temperature is the value that confirms whether the setup remains inside the species range.

Introduce the fish only to a mature, prepared aquarium

Prepare the complete aquarium before the fish arrives. OATA advises checking that the aquarium is an appropriate size for the intended number of gouramis and confirming that ammonia and nitrite are both zero before adding fish. For this species, that size check must include the adult plan even when the selected dispatch size is 6 cm, 7 cm or 9 cm.

Add livestock slowly because the beneficial bacteria in a mature filter must respond when fish numbers and feeding increase. OATA calls the failure caused by adding too many fish too quickly “new tank syndrome”: the bacterial population cannot process the increased waste, so ammonia and nitrite can rise to harmful levels.

Complete the aquarium checks in order

1. Adult home: confirm at least the 183 × 61 cm base and approximately 681-litre absolute minimum for one adult.
2. Filtration: run a mature biological filter sized for the planned system.
3. Water: confirm ammonia and nitrite at zero mg/l and place temperature, pH and hardness inside the stated ranges.
4. Stocking: account for the waste and space needs of every existing fish before adding this one.
5. Feeding: begin the once-daily, few-minutes routine without adding excess food.

Read the current delivery and Live Arrival Guarantee policy while planning receipt. Keep the aquarium, filter and water ready before the delivery date rather than attempting to mature or rearrange the system after the animal arrives.

Follow the arrival steps in order

1. Be present to receive the parcel; live fish cannot be left unattended.
2. Start filming while the parcel is still sealed and the outer box is visible.
3. Open the parcel in one continuous take and show the fish still inside the sealed bag.
4. Float the bag for 20–30 minutes before releasing the fish.
5. Never pour the bag water into the aquarium.

A labyrinth fish reaching the surface does not demonstrate that the introduction has succeeded. Judge the setup through measured water quality, normal feeding and the behaviour-and-appearance checks used for all aquarium fish.

Respond promptly to changes in behaviour or appearance

Learn the fish's usual swimming, colour, temperament, breathing, appearance, body condition and feeding response. OATA recommends watching changes in each of these areas because a departure from the fish's normal pattern can reveal a developing problem.

Healthy fish should have clear, bright eyes, undamaged fins, intact scales and no ulcerations or bumps. Check those features alongside stable posture and feeding. A single observation should lead to a water test and closer assessment rather than a guessed diagnosis.

Use each sign to trigger a practical check

The labyrinth organ can support atmospheric breathing, but it does not make ammonia or nitrite safe. Surface behaviour must therefore be assessed alongside water tests rather than dismissed as normal air breathing.

If you are concerned by a health change, test the water quality and contact us for further guidance. Report the measured temperature, pH, ammonia, nitrite and nitrate together with the behaviour or appearance change. Those concrete observations make the next decision clearer than a general description that the fish seems different.

Continue preventive care through mature filtration, weekly testing, a 25% water change at least once a week, controlled feeding and regular filter checks. Do not let a normal appetite replace these measurements; water quality and equipment condition still require direct checks.

Screen every companion by size, temperament and space

Avoid smaller fish because the Gold Giant Gourami may eat them. Seriously Fish describes the species as generally peaceful with other large fish but notes that some adults may become very aggressive, often when the aquarium is too small.

Large body size alone does not settle compatibility. The aquarium must provide enough space for the gourami and every companion at adult size, while each fish must fit the same 20–30°C, pH 6.5–8.0 and 5–25 dGH range. An additional large fish also increases the waste that filtration and weekly maintenance must manage.

OATA's wider gourami guidance says to avoid timid fish, smaller fish that could be eaten and fish that may nip fins. Apply those screens conservatively to this exceptionally large gourami. A fish that cannot feed normally, move away from conflict or maintain its usual behaviour is not passing the practical compatibility test.

Work through the screens before mixing fish

With plenty of room, Seriously Fish says this gourami will usually coexist with knifefish, large catfish and loricariids. These are conditional examples rather than guarantees for every individual or aquarium. Temperament can change as an adult develops, and inadequate space can increase aggression.

Ask us for a stocking and compatibility assessment before combining this gourami with an uncertain companion. Include aquarium dimensions, volume, water values, filtration and the exact common and scientific name of every proposed fish.

Plan a complete adult home for one fish first

This offer supplies one animal per selected quantity. Begin by planning a complete adult aquarium for that one Gold Giant Gourami, including the 183 × 61 cm minimum base, approximately 681-litre absolute minimum, powerful filtration and open surface access.

Do not assume that buying a second animal creates a compatible pair or a required social group. Some adults may become very aggressive, and individual behaviour cannot be predicted from a shared species name. More than one giant gourami should therefore be treated as a separate stocking decision with additional space and a response ready if conflict develops.

Distinguish the three planning cases

Watch for changes in aggression, hiding, feeding access and normal swimming. If one fish is repeatedly excluded from food or space, the combination requires immediate reassessment. Waiting for visible injury is not a suitable test of whether the stocking plan works.

The approximately 681-litre figure is an absolute bare minimum for an adult fish, not a universal allowance that can simply be repeated for every extra occupant. Aquarium shape, the adult size of all fish, hiding places, filtration and observed temperament remain part of the decision.

Avoid smaller fish because they may be eaten. Avoid timid fish and fish that may nip fins. For other large fish, compatibility remains conditional on robust temperament, matching water requirements, sufficient adult space and ongoing observation.

Answer the key questions before choosing this fish

How big does a Gold Giant Gourami get?

The Gold Giant Gourami reaches a recorded maximum of 70 cm standard length, so plan its permanent aquarium around a very large adult rather than its dispatch size.

What size aquarium does Osphronemus goramy need?

An adult needs a base of at least 183 × 61 cm and around 681 litres as an absolute bare minimum, with a bigger aquarium and powerful filtration preferred.

How many Gold Giant Gouramis should I keep?

Plan a complete adult home for one fish first; assess every additional giant gourami separately because some adults may become very aggressive.

Does this fish suit beginners?

This fish requires an adult aquarium of at least 183 × 61 cm and around 681 litres, powerful filtration and careful compatibility planning, so choose it only if you can manage that long-term commitment.

What does a Gold Giant Gourami eat?

Feed the Gold Giant Gourami quality dried and algae-based foods with pellets, frozen foods and vegetable matter, giving only what it eats within a few minutes once a day.

What temperature and pH does it need?

Keep it at 20–30°C, pH 6.5–8.0 and 5–25 dGH; OATA's group guidance also sets ammonia and nitrite at zero mg/l and nitrate no more than 20 mg/l above tap water.

Is Osphronemus goramy aggressive or likely to nip fins?

Some adults may become very aggressive, often when space is inadequate; avoid timid fish and fish that may nip the gourami's fins.

Which animals can live with a Gold Giant Gourami?

Avoid smaller fish that may be eaten; with plenty of room, Seriously Fish says the Gold Giant Gourami will usually coexist with knifefish, large catfish and loricariids, subject to adult space, water and temperament checks.

How does a Gold Giant Gourami arrive alive in the UK?

Start filming the sealed parcel before opening it and continue in one take until the Gold Giant Gourami is shown inside the sealed bag. Someone must be present to receive it; float the bag for 20–30 minutes, then release the fish without pouring the bag water into the aquarium.

Consult the identity and care references

• FishBase: Osphronemus goramy — scientific identity, family, distribution, environmental values, wild diet and maximum standard length.
• Seriously Fish: Osphronemus goramy — adult aquarium minimum, water range, filtration, layout, diet and compatibility.
• OATA: gouramis and paradise fish — group guidance on water quality, feeding, introduction, maintenance and observation.
• RSPCA: aquarium environment and filters — biological filtration and the conversion of ammonia through nitrite to nitrate.
• Tropical Fish Co delivery policy — receipt, continuous unboxing video, floating and release procedure.