Can Black Skirt Tetra and Gertrude's Spotted Blue-eye Live Together?
Yes, Black Skirt Tetra and Gertrude's Spotted Blue-eye 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
Behaviour & Temperament
Black Skirt Tetra is a generally mild-mannered species (4/10), while Gertrude's Spotted Blue-eye is peaceful (2/10). This modest difference means Black Skirt Tetra may occasionally assert dominance over Gertrude's Spotted Blue-eye.
Black Skirt Tetra and Gertrude's Spotted Blue-eye 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: Gertrude's Spotted Blue-eye is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 21°C and 26°C. Aim for the midpoint of this range (around 23.5°C) for optimal comfort.
Both fish can tolerate a pH between 6 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 5–15 dGH. Regular testing will ensure conditions stay within this range.
Tank Setup
To house Black Skirt Tetra and Gertrude's Spotted Blue-eye 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, Leaf Litter/Blackwater. 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 Gertrude's Spotted Blue-eye live together?▾
Yes. Black Skirt Tetra and Gertrude's Spotted Blue-eye 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 Gertrude's Spotted Blue-eye 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 Gertrude's Spotted Blue-eye together?▾
Keep the aquarium between 21°C and 26°C. A target of around 23.5°C sits comfortably within both species' preferred ranges.
Are Black Skirt Tetra or Gertrude's Spotted Blue-eye aggressive?▾
Black Skirt Tetra is generally mild-mannered (4/10) and Gertrude's Spotted Blue-eye is peaceful (2/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Black Skirt Tetra and Gertrude's Spotted Blue-eye need?▾
Both species overlap in the 6–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Will Black Skirt Tetra nip Gertrude's Spotted Blue-eye's fins?▾
Black Skirt Tetra is a known fin nipper. If Gertrude's Spotted Blue-eye 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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