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Black Neon Tetra Care Guide

Hyphessobrycon herbertaxelrodi · Easy care · 15 gallon minimum

Updated June 2026
By the AquaStocker team · How we source our data
Black Neon Tetra (Hyphessobrycon herbertaxelrodi)
Photo via Wikimedia Commons 📌 Save

A hardier alternative to the neon with a white-over-black stripe; great beginner schooling fish.

Adult size1.5"
Min tank15 gal
Temp73–81°F
pH5.5–7.5
TemperamentPeaceful
SocialGroups of 6+
Care levelEasy
DietOmnivore

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How big does a black neon tetra get?

A black neon tetra (Hyphessobrycon herbertaxelrodi) reaches about 1.5 inches as an adult. Plan tank size and tank mates around the adult size, not the small fish you buy at the store.

Tank size & setup

Give a black neon tetra a minimum of 15 gallons, with water at 73–81°F and a pH of 5.5–7.5. Keep them in groups of at least 6 — they are shoaling fish and become stressed and washed-out alone. As a easy-care, omnivore species, a stable, cycled tank with the right diet keeps them healthiest.

Good tank mates

Pair a black neon tetra with peaceful species that share its temperature and pH range. Compatible options include:

About the black neon tetra

The black neon tetra is a freshwater fish of the characin family (Characidae) of the order Characiformes. It is native to the Paraguay basin of southern Brazil. They are often found in the aquarium trade, and a feral population has been established in the rio Paraíba do Sul basin due to the trade.

Recommended gear for black neon tetras

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FAQ

What size tank does a black neon tetra need?
At least 15 gallons. Because they shoal, budget for a group of 6+ rather than a single fish. Bigger is always more forgiving for water quality.
Is the black neon tetra good for beginners?
Yes — it's a easy-care species that tolerates typical community conditions.

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