Aquarium Planner

A beginner-friendly fish guide

Black Skirt Tetra

Black Skirt / Black Widow Tetra

Gymnocorymbus ternetzi

Moderate temperament; shoaling fish. Check the planner before choosing tank mates.

Beginner level 4/5

A good environment

Recommended temperature
22 ~ 25°C
Recommended pH
6.2 ~ 7.0
Preferred water hardness
Medium hardness
Minimum aquarium
72L or more

Reference sources list a wider range of 20~26°C and pH 6.0~7.0. The planner uses the narrower range above as a safer starting point for beginners.

At a glance

Group
Tetras
Average adult size
about 6 cm (small)
Minimum tank length
about 75 cm
Activity level
Moderate
Waste level
Low
Lid recommended
Not required
Mature tank preferred
Not required

Temperament & group size

Moderate temperament; Shoaling fish.

For a comfortable group, keep at least 6.

Usually swims in the middle.

Tank-mate notes

Adult shrimp may be attacked; take care with shrimp tank mates.

Baby shrimp may be eaten. A separate breeding tank is safer.

Check each combination carefully, especially when size or temperament differs.

Add Black Skirt Tetra to my aquarium

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Frequently asked questions

How big does Black Skirt Tetra get, and what tank size does it need?

Adults average about 6 cm, a small species. The planner recommends an aquarium of at least 72 L and about 75 cm long.

What water temperature and pH does Black Skirt Tetra need?

The planner range is 22~25°C and pH 6.2~7.0, with medium hardness. Reference sources list a wider range of 20~26°C and pH 6.0~7.0. The planner uses the narrower range above as a safer starting point for beginners.

How many Black Skirt Tetra should be kept together?

Shoaling fish: keep at least 6. Temperament is moderate.

Can Black Skirt Tetra live with shrimp?

Adult shrimp: use caution. Baby shrimp: not recommended.

Is Black Skirt Tetra a good fish for beginners?

Beginner level 4/5. Activity: moderate; waste: low.