Can yellow labs live with black neon tetras?

Verdict
Yes, with care

Yes, with care. Yellow labs and black neon tetras can share a tank, but watch one thing. Different water: yellow labs want pH 7.8–8.6, black neon tetras want pH 5.5–7.5.

Electric yellow cichlidElectric yellow cichlid75–82°F · pH 7.8–8.6 Black neon tetraBlack neon tetra73–81°F · pH 5.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–81°Electric yellow cichlid 75–82°Black neon tetra 73–81°
The green band is the temperature range both can live in.
456789Electric yellow cichlid 7.8–8.6Black neon tetra 5.5–7.5
No pH suits both. One would live in the wrong water all the time.

Size to scale

Electric yellow cichlid · 4 inBlack neon tetra · 1.5 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

Electric yellow cichlidBlack neon tetra
Temperature75–82 °F73–81 °F
pH7.8–8.65.5–7.5
Adult size4.0 in1.5 in
Minimum tank40 gal15 gal
TemperamentSemi-aggressivePeaceful
Swims atAll levelsMiddle
GroupGroups of 4+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for yellow labs

All electric yellow cichlid tank mates

Better tank mates for black neon tetras

All black neon tetra tank mates

Questions

Can yellow labs live with black neon tetras?

Yes, with care. Yellow labs and black neon tetras can share a tank, but watch one thing. Different water: yellow labs want pH 7.8–8.6, black neon tetras want pH 5.5–7.5.

What temperature suits both yellow labs and black neon tetras?

75–81 °F. Yellow labs need 75–82 °F, black neon tetras need 73–81 °F.

What size tank do yellow labs and black neon tetras need together?

At least 40 gal, set by the electric yellow cichlid. Add space for each extra fish.