Can peacock cichlids live with dwarf neon rainbowfish?

Verdict
Yes, with care

Yes, with care. Peacock cichlids and dwarf neon rainbowfish can share a tank, but watch one thing. Different water: peacock cichlids want pH 7.8–8.6, dwarf neon rainbowfish want pH 6.5–7.5.

Peacock cichlidPeacock cichlid76–82°F · pH 7.8–8.6 Dwarf neon rainbowfishDwarf neon rainbowfish75–82°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–82°Peacock cichlid 76–82°Dwarf neon rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Peacock cichlid 7.8–8.6Dwarf neon rainbowfish 6.5–7.5
No pH suits both. One would live in the wrong water all the time.

Size to scale

Peacock cichlid · 6 inDwarf neon rainbowfish · 2.5 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

Peacock cichlidDwarf neon rainbowfish
Temperature76–82 °F75–82 °F
pH7.8–8.66.5–7.5
Adult size6.0 in2.5 in
Minimum tank55 gal20 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupGroups of 4+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Better tank mates for dwarf neon rainbowfish

All dwarf neon rainbowfish tank mates

Questions

Can peacock cichlids live with dwarf neon rainbowfish?

Yes, with care. Peacock cichlids and dwarf neon rainbowfish can share a tank, but watch one thing. Different water: peacock cichlids want pH 7.8–8.6, dwarf neon rainbowfish want pH 6.5–7.5.

What temperature suits both peacock cichlids and dwarf neon rainbowfish?

76–82 °F. Peacock cichlids need 76–82 °F, dwarf neon rainbowfish need 75–82 °F.

What size tank do peacock cichlids and dwarf neon rainbowfish need together?

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