Black skirt Tetras & Small Schools — Variety Guide
Black skirt — one of the tetras & small schools varieties owners search for by name.
Black skirt is one of the tetras & small schools varieties people look up by name. This page answers the questions owners actually type about black skirt, then points you to the sourced tetras & small schools care guidance that applies to every variety.
Schooling fish — the rule is six or more, always.
Quick answer: Black skirt is a variety of tetras & small schools. Everything on this page is tetras & small schools-level guidance — we do not invent variety-specific numbers.
The care below is tetras & small schools-level guidance from our species hub, sourced to Merck Veterinary Manual — Exotic & Laboratory Animals: Aquarium Fish and RSPCA — Aquarium fish advice. It applies to Black skirt exactly as it applies to every other tetras & small schools variety. We do not publish variety-specific temperament, lifespan or weight numbers that we cannot source.
School size and tank layout
10+ of one species is the floor for real schooling; mixed-species 'schools' do not merge. A 60–90 cm tank (20–40 gal) suits most small tetras. Open mid-water swimming space plus planted edges is the layout they evolved for — dark substrate and subdued light make colors pop and calm them. Cover the top: rummy-nose and others jump when chased.
Water chemistry: soft and stable wins
Most popular tetras come from soft, acidic South American water: pH 6.0–7.0, temperature 23–27°C (74–80°F) for neons and cardinals, zero ammonia and nitrite, nitrate under 20 ppm. Cardinals prefer the warmer, softer end; black skirts and bloodfins tolerate harder tap water. If your tap water is hard and alkaline, choose forgiving species rather than fighting chemistry with additives — stability matters more than any textbook number.
What people ask about Black skirt
Black skirt tetra?
This is one of the questions people actually type about black skirt. The sourced tetras & small schools answer lives in our species hub, linked from this page — the same rules apply to Black skirt as to any other tetras & small schools variety.
Black skirt tetra male or female?
This is one of the questions people actually type about black skirt. The sourced tetras & small schools answer lives in our species hub, linked from this page — the same rules apply to Black skirt as to any other tetras & small schools variety.
Black skirt tetra male vs female?
This is one of the questions people actually type about black skirt. The sourced tetras & small schools answer lives in our species hub, linked from this page — the same rules apply to Black skirt as to any other tetras & small schools variety.
Black skirt tetra lifespan?
This is one of the questions people actually type about black skirt. The sourced tetras & small schools answer lives in our species hub, linked from this page — the same rules apply to Black skirt as to any other tetras & small schools variety.
Black skirt tetra tank mates?
This is one of the questions people actually type about black skirt. The sourced tetras & small schools answer lives in our species hub, linked from this page — the same rules apply to Black skirt as to any other tetras & small schools variety.
Other tetras & small schools varieties
Neon tetra Cardinal tetra Ember tetra Rummy-nose Bloodfin Congo tetra
Sources
- Merck Veterinary Manual — Exotic & Laboratory Animals: Aquarium Fish — verified 2026-10-18
- RSPCA — Aquarium fish advice — verified 2026-10-18