Can Black Skirt Tetra and Scat (Brackish) Live Together?

🔴Not Recommended

Black Skirt Tetra and Scat (Brackish) are not recommended as tank mates due to incompatible water types. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.


At a Glance

Black Skirt Tetra

Gymnocorymbus ternetzi

Scat (Brackish)

Scatophagus argus

🐠Family Group
Black Skirt Tetra
Characins
Scat (Brackish)
Oddballs
Temperament
Black Skirt Tetra
Mostly Peaceful (4/10)
Scat (Brackish)
Mostly Peaceful (4/10)
Temperature
✓ Compatible
Black Skirt Tetra
20–26°C
Scat (Brackish)
20–28°C
pH Range
✓ Compatible
Black Skirt Tetra
6–8
Scat (Brackish)
7.5–8.5
Hardness (dGH)
✓ Compatible
Black Skirt Tetra
3–15
Scat (Brackish)
12–30
Water Type
✗ No overlap
Black Skirt Tetra
Freshwater Only
Scat (Brackish)
Brackish Required
Flow Preference
✓ Compatible
Black Skirt Tetra
Moderate
Scat (Brackish)
High
Min Tank Volume
Combined: 540 L
Black Skirt Tetra
55 L
Scat (Brackish)
450 L
Swimming Level
Shared: 1 zone
Black Skirt Tetra
Middle
Scat (Brackish)
MiddleBottom
🏷️Behavior Tags
Black Skirt Tetra
Hyperactive / Fast SwimmerFin Nipper
Scat (Brackish)
Plant DestroyerHyperactive / Fast SwimmerAggressive Eater (Starves shy fish)Fin Nipper

Behaviour & Temperament

Both Black Skirt Tetra and Scat (Brackish) are generally mild-mannered species with an aggression score of 4/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.

Black Skirt Tetra and Scat (Brackish) 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 20°C and 26°C. Aim for the midpoint of this range (around 23.0°C) for optimal comfort.

Both fish can tolerate a pH between 7.5 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 12–15 dGH. Regular testing will ensure conditions stay within this range.

Crucially, these species require different water types — one needs freshwater while the other requires brackish conditions. This is a hard barrier to keeping them together.

Tank Setup

To house Black Skirt Tetra and Scat (Brackish) together, plan for an aquarium of at least 540 litres with a minimum length of 150 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, Sand (Sifters), Smooth Gravel (Sensitive Barbels), Established Algae (Otocinclus). Meeting these requirements will help both species thrive.

Note a potential conflict in setup requirements: Scat (Brackish) is a plant destroyer, which conflicts with Black Skirt Tetra's requirement for live plants. Compromise where possible or prioritise the more critical need.

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 Scat (Brackish) live together?

No. This combination is not recommended. Key incompatibilities — such as different water type needs — make cohabitation unsafe.

What size tank do Black Skirt Tetra and Scat (Brackish) need?

A minimum of 540 litres (tank length at least 150 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 Scat (Brackish) together?

Keep the aquarium between 20°C and 26°C. A target of around 23.0°C sits comfortably within both species' preferred ranges.

Are Black Skirt Tetra or Scat (Brackish) aggressive?

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

What pH do Black Skirt Tetra and Scat (Brackish) need?

Both species overlap in the 7.5–8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

Will Black Skirt Tetra nip Scat (Brackish)'s fins?

Black Skirt Tetra is a known fin nipper. If Scat (Brackish) 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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