AquaStocker

Serpae Tetra Care Guide

Hyphessobrycon eques · Easy care · 20 gallon minimum

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

A blood-red tetra that's beautiful but a known fin-nipper — keep a large group to diffuse aggression.

Adult size1.75"
Min tank20 gal
Temp72–79°F
pH5–7.5
TemperamentSemi-aggressive
SocialGroups of 8+
Care levelEasy
DietOmnivore

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How big does a serpae tetra get?

A serpae tetra (Hyphessobrycon eques) reaches about 1.75 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 serpae tetra a minimum of 20 gallons, with water at 72–79°F and a pH of 5–7.5. Keep them in groups of at least 8 — 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 serpae tetra with peaceful species that share its temperature and pH range. Compatible options include:

About the serpae tetra

The serpae tetra, also known as the Callistus tetra, red tetra, jewel tetra or blood characin, is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American tetras. This species is found in South America.

Recommended gear for serpae tetras

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FAQ

What size tank does a serpae tetra need?
At least 20 gallons. Because they shoal, budget for a group of 8+ rather than a single fish. Bigger is always more forgiving for water quality.
Is the serpae tetra good for beginners?
Yes — it's a easy-care species that tolerates typical community conditions.

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