Can rummy nose tetras live with peacock cichlids?

Verdict
No

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

Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7 Peacock cichlidPeacock cichlid76–82°F · 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°Rummy nose tetra 75–84°Peacock cichlid 76–82°
The green band is the temperature range both can live in.
456789Rummy nose 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

Rummy nose tetra · 2 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

Rummy nose tetraPeacock cichlid
Temperature75–84 °F76–82 °F
pH5.5–77.8–8.6
Adult size2.0 in6.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Groups of 4+
DietOmnivoreCarnivore

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Better tank mates for peacock cichlids

All peacock cichlid tank mates

Questions

Can rummy nose tetras live with peacock cichlids?

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

What temperature suits both rummy nose tetras and peacock cichlids?

76–82 °F. Rummy nose tetras need 75–84 °F, peacock cichlids need 76–82 °F.

What size tank do rummy nose tetras and peacock cichlids need together?

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