Can neon tetras live with ember tetras?

Verdict
Yes

Yes. Neon tetras and ember tetras make a good pair. Both are fine at 73–79°F. Plan on at least 10 gal.

Neon tetraNeon tetra72–79°F · pH 6–7 Ember tetraEmber tetra73–84°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Neon tetra 72–79°Ember tetra 73–84°
The green band is the temperature range both can live in.
456789Both: 6–7Neon tetra 6–7Ember tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Neon tetra · 1.5 inEmber tetra · 0.8 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

Neon tetraEmber tetra
Temperature72–79 °F73–84 °F
pH6–75.5–7
Adult size1.5 in0.8 in
Minimum tank10 gal5 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for neon tetras

All neon tetra tank mates

Better tank mates for ember tetras

All ember tetra tank mates

Questions

Can neon tetras live with ember tetras?

Yes. Neon tetras and ember tetras make a good pair. Both are fine at 73–79°F. Plan on at least 10 gal.

What temperature suits both neon tetras and ember tetras?

73–79 °F. Neon tetras need 72–79 °F, ember tetras need 73–84 °F.

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

At least 10 gal, set by the neon tetra. Add space for each extra fish.