Can sparkling gouramis live with rummy nose tetras?

Verdict
Yes

Yes, sparkling gouramis and rummy nose tetras can live together. Both are fine at 75–82°F. Plan on at least 20 gal.

Sparkling gouramiSparkling gourami72–82°F · pH 6–7.5 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°Sparkling gourami 72–82°Rummy nose tetra 75–84°
The green band is the temperature range both can live in.
456789Both: 6–7Sparkling gourami 6–7.5Rummy nose tetra 5.5–7
The green band is the pH both tolerate.

Size to scale

Sparkling gourami · 1.5 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

Sparkling gouramiRummy nose tetra
Temperature72–82 °F75–84 °F
pH6–7.55.5–7
Adult size1.5 in2.0 in
Minimum tank5 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 4+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for sparkling gouramis

All sparkling gourami tank mates

Better tank mates for rummy nose tetras

All rummy nose tetra tank mates

Questions

Can sparkling gouramis live with rummy nose tetras?

Yes, sparkling gouramis and rummy nose tetras can live together. Both are fine at 75–82°F. Plan on at least 20 gal.

What temperature suits both sparkling gouramis and rummy nose tetras?

75–82 °F. Sparkling gouramis need 72–82 °F, rummy nose tetras need 75–84 °F.

What size tank do sparkling gouramis and rummy nose tetras need together?

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