Can rummy nose tetras live with yellow labs?

Verdict
No

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

Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7 Electric yellow cichlidElectric yellow cichlid75–82°F · pH 7.8–8.6

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Rummy nose tetra 75–84°Electric yellow cichlid 75–82°
The green band is the temperature range both can live in.
456789Rummy nose tetra 5.5–7Electric yellow 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 inElectric yellow cichlid · 4 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 tetraElectric yellow cichlid
Temperature75–84 °F75–82 °F
pH5.5–77.8–8.6
Adult size2.0 in4.0 in
Minimum tank20 gal40 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleAll levels
GroupGroups of 6+Groups of 4+
DietOmnivoreOmnivore

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Better tank mates for yellow labs

All electric yellow cichlid tank mates

Questions

Can rummy nose tetras live with yellow labs?

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

What temperature suits both rummy nose tetras and yellow labs?

75–82 °F. Rummy nose tetras need 75–84 °F, yellow labs need 75–82 °F.

What size tank do rummy nose tetras and yellow labs need together?

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