Can neon tetras live with rummy nose tetras?

Verdict
Yes

Yes, neon tetras and rummy nose tetras can live together. Both are fine at 75–79°F. Plan on at least 20 gal.

Neon tetraNeon tetra72–79°F · pH 6–7 Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7

Why it works

Water side by side

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

Size to scale

Neon tetra · 1.5 inRummy nose 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

Neon tetraRummy nose tetra
Temperature72–79 °F75–84 °F
pH6–75.5–7
Adult size1.5 in2.0 in
Minimum tank10 gal20 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 rummy nose tetras

All rummy nose tetra tank mates

Questions

Can neon tetras live with rummy nose tetras?

Yes, neon tetras and rummy nose tetras can live together. Both are fine at 75–79°F. Plan on at least 20 gal.

What temperature suits both neon tetras and rummy nose tetras?

75–79 °F. Neon tetras need 72–79 °F, rummy nose tetras need 75–84 °F.

What size tank do neon tetras and rummy nose tetras need together?

At least 20 gal, set by the rummy nose tetra. Add space for each extra fish.