Can pearl gouramis live with congo tetras?

Verdict
Yes

Yes. Pearl gouramis and congo tetras get along in the same tank. Both are fine at 77–82°F. Plan on at least 30 gal.

Pearl gouramiPearl gourami77–82°F · pH 6–7.5 Congo tetraCongo tetra73–82°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 77–82°Pearl gourami 77–82°Congo tetra 73–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Pearl gourami 6–7.5Congo tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Pearl gourami · 5 inCongo tetra · 3 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

Pearl gouramiCongo tetra
Temperature77–82 °F73–82 °F
pH6–7.56–7.5
Adult size5.0 in3.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for pearl gouramis

All pearl gourami tank mates

Better tank mates for congo tetras

All congo tetra tank mates

Questions

Can pearl gouramis live with congo tetras?

Yes. Pearl gouramis and congo tetras get along in the same tank. Both are fine at 77–82°F. Plan on at least 30 gal.

What temperature suits both pearl gouramis and congo tetras?

77–82 °F. Pearl gouramis need 77–82 °F, congo tetras need 73–82 °F.

What size tank do pearl gouramis and congo tetras need together?

At least 30 gal, set by the pearl gourami. Add space for each extra fish.