Black Skirt Tetra Tank Size 101: (All You Need to Know!)

What is the ideal black skirt tetra tank size? The Black Skirt fish, also known as the Black Widow Tetra, is popular among aquarium enthusiasts for its striking appearance and peaceful nature.

To ensure the health and well-being of these small freshwater fish, it is essential to provide them with the appropriate tank size and environment.

This comprehensive black skirt tetra care guide will cover everything you need about the ideal tank size for Black Skirt Tetras.

From the minimum black widow tetra tank size requirements to additional considerations such as filtration, lighting, and substrate, we will provide all the information you need to create a suitable habitat for your Black Skirt Tetras.

how many black skirt tetras in a 10 gallon tank

Whether you are a beginner looking to set up your first aquarium or a seasoned hobbyist seeking to improve the living conditions for your Skirt Tetras, this guide will serve as a valuable resource for creating a thriving environment for these beautiful fish. 

Ideal Black Skirt Tetra Tank Size

To provide the optimal environment, it is recommended that a group of black skirt tetras be housed in an aquarium that is at least 20 gallons in size.

These shoaling fish should be kept in groups of six individuals, as they are schooling fish that thrive in the presence of their kind. The tank should have vegetation for hiding places and a water temperature between 72-82°F. 

How Long Do Black Skirt Tetras Live

When setting up a tank for black skirt tetras, good water quality and parameters are essential to prevent illnesses such as ich. These ornamental fish are known for their black stripes and dorsal fin, adding an elegant touch to any aquatic community tank.

They are swimmers who spend most of their time in the middle and bottom levels of the tank, so it is ideal to have moss or other vegetation to scatter around in.

As they reach sexual maturity, the males may exhibit longer fins and a rounder body shape. Providing a decent group of black tetras is also recommended, as they are shoaling fish that feel more comfortable and secure in a larger group.

Black Widow Tetra Habitat and Care in Aquariums

Black Widow Tetras are native to the rivers of Paraguay and throughout Brazil. They have a bright color pattern with a vertical black dorsal stripe that runs from the caudal fin to about halfway down the body.

The long-finned black widow tetra is a popular morph, but dwarf varieties are also available in the aquarium trade.

When caring for Black Widow Tetras, it is essential to provide plenty of driftwood and plants for them to hide and nip at.

These fast-moving fish need a group of at least six to thrive in a shoal. They should be kept in slightly acidic water with a pH of approximately two.

Black Widow Tetras can be fin nippers, so avoiding keeping them with long-finned species in the aquarium, such as Bettas, is essential. To keep them healthy, it is recommended that they be fed a varied diet of bloodworms and commercially produced fish food.

Common Hybrids of Black Skirt Tetra

There aren’t any true hybrids of the Black Skirt Tetra, but several color variations and fin variations are sometimes mistaken for hybrids. These are created through selective breeding.

Here are the most popular variations of the Black Skirt Tetra:

  • Longfin Black Skirt Tetra: This variation has longer fins than the standard.
  • Gold Skirt Tetra: This variation has a gold body instead of the standard black skirt tetra’s silver body.
  • Black Widow Tetra: This is the original coloring of the widow Tetra. They have a black body, silver skirt, and black dorsal fin.
  • GloFish Black Skirt Tetra: This genetically modified Black Skirt Tetra is fluorescent orange or red. These fish are not recommended for some aquariums because they require special lighting.

Black Skirt Tetra Tank Mates: (Best Tankmates)

These peaceful fish are compatible with other community fish, such as angelfishgourami, glofish Tetra, and danios. Feeding them a varied diet of flake foods, frozen foods like brine shrimp, and live foods will ensure their health and happiness. Black skirt tetras may spawn in captivity if provided with the right conditions, where the eggs will hatch in about 24-36 hours.

Black Skirt Tetras can be a bit fin nippy with some tank mates, so choosing the proper companions is essential. Here are some of the best tank mates for Black Skirt Tetras:

  • Corydoras Catfish: These peaceful bottom feeders are an excellent choice for a community tank with Black Skirt Tetras. They’ll help keep the tank clean by scavenging for leftover food and won’t compete with the tetras for space or food.
  • Rasboras: These small, schooling fish are another excellent Black Skirt Tetra tank option. They are peaceful and won’t be bothered by the tetras’ occasional fin-nipping.
  • Harlequin Rasboras: Like Rasboras, harlequin Rasboras are peaceful schooling fish that make good tank mates for Black Tetras. They are relatively active swimmers and will add a splash of color to the tank.
  • Angelfish: Angelfish can be good tank mates for Black Tetras if the tank is large enough (at least 55 gallons). Angelfish are peaceful fish that won’t bother the tetras and can help add some majesty to the tank. However, be cautious if you plan to keep dwarf angelfish, as Black Skirt Tetras may nip at their fins.
  • Rainbowfish: Rainbowfish are another excellent option for a community tank with Black Skirt Tetras. They are peaceful fish that come in various colors and will add some visual interest to the tank. Just make sure to choose colorful fish species similar in size to the Black Skirt Tetras.

Here are some things to keep in mind when choosing tank mates for Black Skirt Tetras:

  • Tank size: Black Skirt Tetras can grow to be up to 2 inches long, so they need a tank that is at least 20 gallons in size. If you plan to keep tetras and peaceful bottom dwellers, you will need to choose an even larger tank.
  • Water parameters: Black Skirt Tetras prefer slightly acidic water (pH 6.0-7.0) and soft to moderately hard water (dH 4-12). Make sure that any tank mates you choose have similar water parameter requirements.
  • Temperament: Black Skirt Tetras can be fin nippy, so it is crucial to choose tank mates that are peaceful and not too slow-moving. Avoid keeping them with fish that have long dorsal and anal fins, such as bettas or Gouramis, as these fish are more likely to be nipped.

Following these tips, you can choose tank mates to help your Black Skirt Tetras thrive.

How many skirt tetras can you put in a 5 gallon tank?

While one rule of thumb suggests one gallon per fish, skirt tetras are schooling fish and thrive in groups. For a 5-gallon tank, avoid skirt tetras altogether and consider other peaceful Nanofish.

How many black skirt tetras are in a 10 gallon?

A 10-gallon tank is too small for a healthy school of black skirt tetras. They prefer larger spaces to thrive.

How many black skirt tetras are in a 55-gallon tank?

The number of black skirt tetras in a 55-gallon tank depends on tank mates and filtration. A good starting point is 1 fish per 2 gallons, which is around 27 black skirt tetras. Monitor water quality and adjust stocking if needed.

What is the lifespan of a Black Skirt Tetra?

A Black Skirt Tetra’s typical lifespan in a well-maintained aquarium is 3 to 5 years. A spacious tank, high-quality water conditions, and a balanced diet can help them thrive for years.

How many black skirt tetras per gallon?

Aim for 6-8 black skirt tetras per 10 gallons. This provides enough space for them to shoal comfortably and keeps water quality healthy.

How big do skirt Tetras can get?

Purchase size: Skirt tetras, reaching around 2 inches (5.5 cm) in adulthood, are on the larger side for tetras. These peaceful fish thrive in schools of 5 or more and make a beautiful addition to a freshwater aquarium.


So, what is black skirt tetra minimum tank size? In conclusion, tank size plays a crucial role in keeping black skirt tetras. These beautiful and lively fish require adequate space to swim and thrive. A larger tank allows them to exhibit their natural behaviors and helps maintain water quality more effectively.

Remember, black skirt tetras are active swimmers who appreciate a spacious environment that mimics their natural habitat. A tank size of at least 20 gallons is recommended to comfortably accommodate a small group of these tetras. Plenty of hiding spots, plants, and open swimming areas will create an enriching and visually appealing tank setup.

By providing the appropriate black skirt tetra fish tank size, you’re ensuring the health and happiness of your tetras. So, if you’re planning to keep these charming fish, invest in a tank that meets their needs. Whether you’re a beginner or an experienced aquarist, creating an ideal black skirt tetra tank size will undoubtedly enhance the beauty of your aquarium and the lives of your tetras.

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About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

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