Can Black Skirt Tetra and Turquoise Rainbowfish Live Together?

🟢Ideal Tank Mates

Yes, Black Skirt Tetra and Turquoise Rainbowfish are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. A minimum tank size of 192 litres is recommended.


At a Glance

Black Skirt Tetra

Gymnocorymbus ternetzi

Turquoise Rainbowfish

Melanotaenia lacustris

🐠Family Group
Black Skirt Tetra
Characins
Turquoise Rainbowfish
Rainbowfish
Temperament
Black Skirt Tetra
Mostly Peaceful (4/10)
Turquoise Rainbowfish
Peaceful (2/10)
Temperature
✓ Compatible
Black Skirt Tetra
20–26°C
Turquoise Rainbowfish
20–25°C
pH Range
✓ Compatible
Black Skirt Tetra
6–8
Turquoise Rainbowfish
7–9
Hardness (dGH)
✓ Compatible
Black Skirt Tetra
3–15
Turquoise Rainbowfish
10–25
Water Type
✓ Compatible
Black Skirt Tetra
Freshwater Only
Turquoise Rainbowfish
Freshwater Only
Flow Preference
✓ Compatible
Black Skirt Tetra
Moderate
Turquoise Rainbowfish
Moderate
Min Tank Volume
Combined: 192 L
Black Skirt Tetra
55 L
Turquoise Rainbowfish
160 L
Swimming Level
Shared: 1 zone
Black Skirt Tetra
Middle
Turquoise Rainbowfish
TopMiddle
🏷️Behavior Tags
Black Skirt Tetra
Hyperactive / Fast SwimmerFin Nipper
Turquoise Rainbowfish
Hyperactive / Fast SwimmerJumper (Lid Required)Aggressive Eater (Starves shy fish)

Behaviour & Temperament

Black Skirt Tetra is a generally mild-mannered species (4/10), while Turquoise Rainbowfish is peaceful (2/10). This modest difference means Black Skirt Tetra may occasionally assert dominance over Turquoise Rainbowfish.

Black Skirt Tetra and Turquoise Rainbowfish both frequent the Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.

Worth noting: Turquoise Rainbowfish is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 20°C and 25°C. Aim for the midpoint of this range (around 22.5°C) for optimal comfort.

Both fish can tolerate a pH between 7 and 8. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Black Skirt Tetra and Turquoise Rainbowfish together, plan for an aquarium of at least 192 litres with a minimum length of 120 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Plants - Densely covered, Plants - lighly covered. Meeting these requirements will help both species thrive.

Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.

Frequently Asked Questions

Can Black Skirt Tetra and Turquoise Rainbowfish live together?

Yes. Black Skirt Tetra and Turquoise Rainbowfish are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do Black Skirt Tetra and Turquoise Rainbowfish need?

A minimum of 192 litres (tank length at least 120 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.

What water temperature is best for Black Skirt Tetra and Turquoise Rainbowfish together?

Keep the aquarium between 20°C and 25°C. A target of around 22.5°C sits comfortably within both species' preferred ranges.

Are Black Skirt Tetra or Turquoise Rainbowfish aggressive?

Black Skirt Tetra is generally mild-mannered (4/10) and Turquoise Rainbowfish is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Black Skirt Tetra and Turquoise Rainbowfish need?

Both species overlap in the 7–8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Black Skirt Tetra nip Turquoise Rainbowfish's fins?

Black Skirt Tetra is a known fin nipper. If Turquoise Rainbowfish has long or flowing fins, there is a real risk of fin damage. Keeping Black Skirt Tetra in a larger group can help redirect nipping behaviour toward conspecifics.


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