Can sparkling gouramis live with boesemani rainbowfish?

Verdict
Yes

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

Sparkling gouramiSparkling 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°Sparkling gourami 72–82°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Sparkling gourami 6–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Sparkling gourami · 1.5 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

Sparkling gouramiBoesemani rainbowfish
Temperature72–82 °F75–82 °F
pH6–7.57–8
Adult size1.5 in4.0 in
Minimum tank5 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 4+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for sparkling gouramis

All sparkling gourami tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can sparkling gouramis live with boesemani rainbowfish?

Yes. Sparkling 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 sparkling gouramis and boesemani rainbowfish?

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

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

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