Can Black Skirt Tetra and Guppy Live Together?

🟢Ideal Tank Mates

Yes, Black Skirt Tetra and Guppy 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 66 litres is recommended.


At a Glance

Black Skirt Tetra

Gymnocorymbus ternetzi

Guppy

Poecilia reticulata

🐠Family Group
Black Skirt Tetra
Characins
Guppy
Livebearers
Temperament
Black Skirt Tetra
Mostly Peaceful (4/10)
Guppy
Peaceful (1/10)
Temperature
✓ Compatible
Black Skirt Tetra
20–26°C
Guppy
22–28°C
pH Range
✓ Compatible
Black Skirt Tetra
6–8
Guppy
7–8.5
Hardness (dGH)
✓ Compatible
Black Skirt Tetra
3–15
Guppy
8–30
Water Type
✓ Compatible
Black Skirt Tetra
Freshwater Only
Guppy
Brackish Tolerant
Flow Preference
✓ Compatible
Black Skirt Tetra
Moderate
Guppy
Low
Min Tank Volume
Combined: 66 L
Black Skirt Tetra
55 L
Guppy
38 L
Swimming Level
Shared: 1 zone
Black Skirt Tetra
Middle
Guppy
TopMiddle
🏷️Behavior Tags
Black Skirt Tetra
Hyperactive / Fast SwimmerFin Nipper
Guppy
Hyperactive / Fast SwimmerFry Predator

Behaviour & Temperament

Black Skirt Tetra is a generally mild-mannered species (4/10), while Guppy is peaceful (1/10). This modest difference means Black Skirt Tetra may occasionally assert dominance over Guppy.

Black Skirt Tetra and Guppy 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.

Water Parameters

The safe temperature window for both species falls between 22°C and 26°C. Aim for the midpoint of this range (around 24.0°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 8–15 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house Black Skirt Tetra and Guppy together, plan for an aquarium of at least 66 litres with a minimum length of 60 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 - Floating. 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 Guppy live together?

Yes. Black Skirt Tetra and Guppy 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 Guppy need?

A minimum of 66 litres (tank length at least 60 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 Guppy together?

Keep the aquarium between 22°C and 26°C. A target of around 24.0°C sits comfortably within both species' preferred ranges.

Are Black Skirt Tetra or Guppy aggressive?

Black Skirt Tetra is generally mild-mannered (4/10) and Guppy is peaceful (1/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do Black Skirt Tetra and Guppy 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 Guppy's fins?

Black Skirt Tetra is a known fin nipper. If Guppy 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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