Can guppies live with lemon tetras?

Verdict
Yes

Yes, guppies and lemon tetras can live together. Both are fine at 72–82°F. Plan on at least 15 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 Lemon tetraLemon tetra72–82°F · pH 5.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–82°Guppy 72–82°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 6.8–7.5Guppy 6.8–7.8Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Guppy · 2 inLemon tetra · 2 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

GuppyLemon tetra
Temperature72–82 °F72–82 °F
pH6.8–7.85.5–7.5
Adult size2.0 in2.0 in
Minimum tank10 gal15 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can guppies live with lemon tetras?

Yes, guppies and lemon tetras can live together. Both are fine at 72–82°F. Plan on at least 15 gal.

What temperature suits both guppies and lemon tetras?

72–82 °F. Guppies need 72–82 °F, lemon tetras need 72–82 °F.

What size tank do guppies and lemon tetras need together?

At least 15 gal, set by the lemon tetra. Add space for each extra fish.