Can axolotls live with neon tetras?

Verdict
No

No. Axolotls and neon tetras should not share a tank. Axolotls are coldwater animals (60–66°F); neon tetras need 72–79°F. No temperature suits both.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Axolotl 60–66°Neon tetra 72–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6.5–7Axolotl 6.5–8Neon tetra 6–7
The green band is the pH both tolerate.

Size to scale

Axolotl · 10 inNeon tetra · 1.5 in0"2"4"6"8"10"
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

AxolotlNeon tetra
Temperature60–66 °F72–79 °F
pH6.5–86–7
Adult size10.0 in1.5 in
Minimum tank20 gal10 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietCarnivoreOmnivore

Better tank mates for neon tetras

All neon tetra tank mates

Questions

Can axolotls live with neon tetras?

No. Axolotls and neon tetras should not share a tank. Axolotls are coldwater animals (60–66°F); neon tetras need 72–79°F. No temperature suits both.

What temperature suits both axolotls and neon tetras?

None. Axolotls need 60–66 °F and neon tetras need 72–79 °F, so the ranges do not meet.

What size tank do axolotls and neon tetras need together?

At least 20 gal, set by the axolotl. Add space for each extra fish.