Can ember tetras live with peacock cichlids?

Verdict
No

No. Ember tetras and peacock cichlids should not share a tank. Different water: ember tetras want pH 5.5–7, 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: 76–82°Ember tetra 73–84°Peacock cichlid 76–82°
The green band is the temperature range both can live in.
456789Ember tetra 5.5–7Peacock cichlid 7.8–8.6
No pH suits both. One would live in the wrong water all the time.

Size to scale

Ember tetra · 0.8 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

Ember tetraPeacock cichlid
Temperature73–84 °F76–82 °F
pH5.5–77.8–8.6
Adult size0.8 in6.0 in
Minimum tank5 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 4+
DietOmnivoreCarnivore

Better tank mates for ember tetras

All ember tetra tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can ember tetras live with peacock cichlids?

No. Ember tetras and peacock cichlids should not share a tank. Different water: ember tetras want pH 5.5–7, peacock cichlids want pH 7.8–8.6.

What temperature suits both ember tetras and peacock cichlids?

76–82 °F. Ember tetras need 73–84 °F, peacock cichlids need 76–82 °F.

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

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