Can blue gouramis live with zebra loaches?

Verdict
Yes

Yes. Blue gouramis and zebra loaches get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

Blue gouramiBlue gourami72–82°F · pH 6–8 Zebra loachZebra loach73–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Blue gourami 72–82°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Blue gourami 6–8Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Blue gourami · 5 inZebra loach · 3.5 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

Blue gouramiZebra loach
Temperature72–82 °F73–79 °F
pH6–86–7.5
Adult size5.0 in3.5 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atTopBottom
GroupAlone or in pairsGroups of 5+
DietOmnivoreOmnivore

Better tank mates for blue gouramis

All blue gourami tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can blue gouramis live with zebra loaches?

Yes. Blue gouramis and zebra loaches get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both blue gouramis and zebra loaches?

73–79 °F. Blue gouramis need 72–82 °F, zebra loaches need 73–79 °F.

What size tank do blue gouramis and zebra loaches need together?

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