Can platies live with blue gouramis?

Verdict
Yes

Yes. Platies and blue gouramis make a good pair. Both are fine at 72–80°F. Plan on at least 30 gal.

PlatyPlaty70–80°F · pH 7–8.2 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–80°Platy 70–80°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 7–8Platy 7–8.2Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Platy · 2.5 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

PlatyBlue gourami
Temperature70–80 °F72–82 °F
pH7–8.26–8
Adult size2.5 in5.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleTop
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for platies

All platy tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can platies live with blue gouramis?

Yes. Platies and blue gouramis make a good pair. Both are fine at 72–80°F. Plan on at least 30 gal.

What temperature suits both platies and blue gouramis?

72–80 °F. Platies need 70–80 °F, blue gouramis need 72–82 °F.

What size tank do platies and blue gouramis need together?

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