Can congo tetras live with blue gouramis?

Verdict
Yes

Yes, congo tetras and blue gouramis can live together. Both are fine at 73–82°F. Plan on at least 30 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–82°Congo tetra 73–82°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7.5Congo tetra 6–7.5Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 inBlue gourami · 5 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

Congo tetraBlue gourami
Temperature73–82 °F72–82 °F
pH6–7.56–8
Adult size3.0 in5.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleTop
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can congo tetras live with blue gouramis?

Yes, congo tetras and blue gouramis can live together. Both are fine at 73–82°F. Plan on at least 30 gal.

What temperature suits both congo tetras and blue gouramis?

73–82 °F. Congo tetras need 73–82 °F, blue gouramis need 72–82 °F.

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

At least 30 gal, set by the congo tetra. Add space for each extra fish.