How Many Dwarf Gouramis can be Kept in an Aquarium?

Golden Gourami Trio

Dwarf Gouramis (Trichogaster Ialius) are popular aquarium fish due to their small size, peaceful behavior, and vibrant colors. When evaluating how many dwarf gouramis can be kept in an aquarium, consider factors such as tank size, water quality, and compatibility with other tank inhabitants.

This article will discuss the recommended number of Dwarf Gouramis to keep in an aquarium and the various factors to consider when making this decision.


Dwarf Gouramis are beautiful small fish from Southeast Asia. Its preferred habitat is slow-moving waters, such as swamps, marshes, and rice paddies. In an aquarium setting, Gouramis are best when the tank is heavily planted with plenty of hiding spots.

Water conditions: Dwarf Gouramis are best kept in an aquarium with a neutral to slightly acidic pH of 6.5-7.5 and a water temperature of 24-28 degrees Celsius (75-82 degrees Fahrenheit). The water should be soft to medium hardness (3-10 dGH). This species can live in a tropical blackwater aquarium.

The list below considers that there are no other fish in the aquarium. If you plan on adding other fish, consider their size and behavior.

How many Dwarf Gouramis can be Kept in a:


A 5-gallon tank will house at most 3 Gouramis. Males will be likely to be territorial. Choose all females or 1 male and 2 females. Gouramis are very social, so they need not be alone.


Cobalt Dwarf Gourami

Perhaps the most common tank size amongst fishkeepers, the 10-gallon tank will house at most 7 Dwarf Gouramis. 3 Males at most. You now have a decent-sized shoal.

20-Gallon Tank:

In a 20-gallon tank, you can house up to 12 Gouramis.

30-Gallon Tank:

In a 30-gallon tank, 18 Gouramis at most.

40-Gallon Tank:

A 40-gallon tank can comfortably house up to 24 Gouramis, forming a large shoal. This number of fish will not cause any conflict among the group. Conflict amongst the fish is unlikely.

55-Gallon Tank:

In a 55-gallon tank, you can house up to 32 Gouramis.

75-Gallon Tank:

A 75-gallon tank? Now we’re looking for a gigantic shoal of Dwarf Gouramis. This will be stunning. You can house at most around 50 Gouramis.

125-Gallon Tank

A 125-gallon tank will hold a colossal shoal of 75 Gouramis, give or take.


Consider the compatibility of the Gouramis with other aquarium inhabitants. Gouramis are relatively peaceful and can be kept with other small schooling fish, such as Tetras, rasboras, and livebearers like Guppies and Endler’s. However, they can become territorial if kept with larger fish, so it is best to research the fish you plan to keep in the aquarium to ensure compatibility.

Water Quality

One of the main issues with overpopulation in an aquarium is its effect on water quality. If too many fish are in the aquarium, the water quality will likely be poor. We can expect ammonia levels to be very high, adding undue stress to the fish. This can lead to other issues like dull coloration, lethargy, and diseases.


Observation is key. You must be aware whenever fish are not getting along or compatible. Keeping an eye on any changes can help you to identify and fix any potential problems before they become too severe.

Closing Remarks

Dwarf Gouramis can make a beautiful addition to any aquarium. With proper care and consideration for their needs, they can be kept in large groups, providing stunning color and activity to an aquarium. When deciding how many Dwarf Gouramis to keep in an aquarium, consider factors such as tank size, water quality, and compatibility with other tank inhabitants. If you have any comments or questions or want to share your experience housing Gouramis, please write in the comment section below.

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