What size tank does a Black Skirt Tetra need?

Black Skirt Tetra needs a minimum of 15 gallons, with 20 gallons recommended. They are middle swimmers. Keep in groups of 5+.

Is Black Skirt Tetra good for beginners?

Black Skirt Tetra is rated "beginner" difficulty (1/5). Great for beginners.

What fish are compatible with Black Skirt Tetra?

Black Skirt Tetra is peaceful. Compatible tank mates include other peaceful fish with similar water parameters (pH 6-7.5, temp 70-82°F).

Black Skirt Tetra

Gymnocorymbus ternetzi

Family: Characidae • Origin: South America

The Black Skirt Tetra is an extremely hardy, long-lived tetra with dramatic black fins. One of the toughest beginner fish available.

Min Tank

15 gal

Max Size

Temperature

70-82°F

6-7.5

Lifespan

5 years

School Size

Swim Level

middle

Hardness

5-20 dGH

peacefulbeginneromnivoreschooling

Is Black Skirt Tetra Right for Your Tank?

Black Skirt Tetra is an excellent choice for beginners — rated "beginner" difficulty (1/5). They're hardy, forgiving of minor water parameter fluctuations, and generally easy to feed. A 15-gallon tank minimum is standard — most community setups will accommodate them.

With a peaceful temperament, Black Skirt Tetra makes a great community fish. They coexist well with other non-aggressive species of similar size. This is a schooling species — keep at least 5 together, or they may become stressed and display abnormal behavior. Expected lifespan: 5 years with proper care.

Common Mistakes with Black Skirt Tetra

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Keeping fewer than 5 together

Black Skirt Tetra is a schooling species — they need a group of at least 5 to feel secure. Lone or paired individuals become stressed, hide constantly, and may develop health issues or aggression.

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Relying on a heater without a thermometer

Black Skirt Tetra needs 70–82°F. Heaters malfunction or drift over time — always use a separate thermometer to verify. Temperature swings of even 3–4°F can trigger stress and disease, particularly ich.

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Putting them in a tank under 15 gallons

Many beginners underestimate tank size needs. Black Skirt Tetra requires at least 15 gallons — ideally 20. Cramped tanks lead to stunted growth, aggression, and poor water quality.