Can chili rasboras live with rummy nose tetras?

Verdict
Yes

Yes. Chili rasboras and rummy nose tetras make a good pair. Both are fine at 75–82°F. Plan on at least 20 gal.

Chili rasboraChili rasbora75–82°F · pH 4–7 Rummy nose tetraRummy nose tetra75–84°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Chili rasbora 75–82°Rummy nose tetra 75–84°
The green band is the temperature range both can live in.
456789Both: 5.5–7Chili rasbora 4–7Rummy nose tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Chili rasbora · 0.8 inRummy nose tetra · 2 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

Chili rasboraRummy nose tetra
Temperature75–82 °F75–84 °F
pH4–75.5–7
Adult size0.8 in2.0 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 8+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for chili rasboras

All chili rasbora tank mates

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Questions

Can chili rasboras live with rummy nose tetras?

Yes. Chili rasboras and rummy nose tetras make a good pair. Both are fine at 75–82°F. Plan on at least 20 gal.

What temperature suits both chili rasboras and rummy nose tetras?

75–82 °F. Chili rasboras need 75–82 °F, rummy nose tetras need 75–84 °F.

What size tank do chili rasboras and rummy nose tetras need together?

At least 20 gal, set by the rummy nose tetra. Add space for each extra fish.