AquaStocker

Lemon Tetra Care Guide

Hyphessobrycon pulchripinnis · Easy care · 20 gallon minimum

Updated June 2026
By the AquaStocker team · How we source our data
Lemon Tetra (Hyphessobrycon pulchripinnis)
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A translucent yellow tetra with lemon-and-black fin accents; peaceful and hardy for community tanks.

Adult size2.0"
Min tank20 gal
Temp72–82°F
pH5.5–7.5
TemperamentPeaceful
SocialGroups of 6+
Care levelEasy
DietOmnivore

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How big does a lemon tetra get?

A lemon tetra (Hyphessobrycon pulchripinnis) reaches about 2.0 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 lemon tetra a minimum of 20 gallons, with water at 72–82°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 lemon tetra with peaceful species that share its temperature and pH range. Compatible options include:

About the lemon tetra

The lemon tetra is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is from South America. It is a small tetra growing to 5 cm (2 in) in length. The species is a long established favourite aquarium fish, being introduced to the aquarium in 1932.

Recommended gear for lemon tetras

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FAQ

What size tank does a lemon tetra need?
At least 20 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 lemon tetra good for beginners?
Yes — it's a easy-care species that tolerates typical community conditions.

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