Can honey gouramis live with boesemani rainbowfish?

Verdict
Yes

Yes. Honey gouramis and boesemani rainbowfish make a good pair. Both are fine at 75–82°F. Plan on at least 30 gal.

Honey gouramiHoney gourami72–82°F · pH 6–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Honey gourami 72–82°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Honey gourami 6–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Honey gourami · 2 inBoesemani rainbowfish · 4 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

Honey gouramiBoesemani rainbowfish
Temperature72–82 °F75–82 °F
pH6–7.57–8
Adult size2.0 in4.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for honey gouramis

All honey gourami tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can honey gouramis live with boesemani rainbowfish?

Yes. Honey gouramis and boesemani rainbowfish make a good pair. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both honey gouramis and boesemani rainbowfish?

75–82 °F. Honey gouramis need 72–82 °F, boesemani rainbowfish need 75–82 °F.

What size tank do honey gouramis and boesemani rainbowfish need together?

At least 30 gal, set by the boesemani rainbowfish. Add space for each extra fish.