Can ember tetras live with lemon tetras?

Verdict
Yes

Yes. Ember tetras and lemon tetras get along in the same tank. Both are fine at 73–82°F. Plan on at least 15 gal.

Ember tetraEmber tetra73–84°F · pH 5.5–7 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: 73–82°Ember tetra 73–84°Lemon tetra 72–82°
The green band is the temperature range both can live in.
456789Both: 5.5–7Ember tetra 5.5–7Lemon tetra 5.5–7.5
The green band is the pH both tolerate.

Size to scale

Ember tetra · 0.8 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

Ember tetraLemon tetra
Temperature73–84 °F72–82 °F
pH5.5–75.5–7.5
Adult size0.8 in2.0 in
Minimum tank5 gal15 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for ember tetras

All ember tetra tank mates

Better tank mates for lemon tetras

All lemon tetra tank mates

Questions

Can ember tetras live with lemon tetras?

Yes. Ember tetras and lemon tetras get along in the same tank. Both are fine at 73–82°F. Plan on at least 15 gal.

What temperature suits both ember tetras and lemon tetras?

73–82 °F. Ember tetras need 73–84 °F, lemon tetras need 72–82 °F.

What size tank do ember tetras and lemon tetras need together?

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