Can neon tetras live with peacock cichlids?

Verdict
No

No. Neon tetras and peacock cichlids should not share a tank. Different water: neon tetras want pH 6–7, peacock cichlids want pH 7.8–8.6.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–79°Neon tetra 72–79°Peacock cichlid 76–82°
The green band is the temperature range both can live in.
456789Neon tetra 6–7Peacock cichlid 7.8–8.6
No pH suits both. One would live in the wrong water all the time.

Size to scale

Neon tetra · 1.5 inPeacock cichlid · 6 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 tetraPeacock cichlid
Temperature72–79 °F76–82 °F
pH6–77.8–8.6
Adult size1.5 in6.0 in
Minimum tank10 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 4+
DietOmnivoreCarnivore

Better tank mates for neon tetras

All neon tetra tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can neon tetras live with peacock cichlids?

No. Neon tetras and peacock cichlids should not share a tank. Different water: neon tetras want pH 6–7, peacock cichlids want pH 7.8–8.6.

What temperature suits both neon tetras and peacock cichlids?

76–79 °F. Neon tetras need 72–79 °F, peacock cichlids need 76–82 °F.

What size tank do neon tetras and peacock cichlids need together?

At least 55 gal, set by the peacock cichlid. Add space for each extra fish.