Can blue gouramis live with swordtails?

Verdict
Yes

Yes. Blue gouramis and swordtails make a good pair. Both are fine at 72–79°F. Plan on at least 30 gal.

Blue gouramiBlue gourami72–82°F · pH 6–8 SwordtailSwordtail72–79°F · pH 7–8.3

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Blue gourami 72–82°Swordtail 72–79°
The green band is the temperature range both can live in.
456789Both: 7–8Blue gourami 6–8Swordtail 7–8.3
The green band is the pH both tolerate.

Size to scale

Blue gourami · 5 inSwordtail · 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 gouramiSwordtail
Temperature72–82 °F72–79 °F
pH6–87–8.3
Adult size5.0 in5.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atTopMiddle
GroupAlone or in pairsGroups of 3+
DietOmnivoreOmnivore

Better tank mates for blue gouramis

All blue gourami tank mates

Better tank mates for swordtails

All swordtail tank mates

Questions

Can blue gouramis live with swordtails?

Yes. Blue gouramis and swordtails make a good pair. Both are fine at 72–79°F. Plan on at least 30 gal.

What temperature suits both blue gouramis and swordtails?

72–79 °F. Blue gouramis need 72–82 °F, swordtails need 72–79 °F.

What size tank do blue gouramis and swordtails need together?

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