Can bristlenose plecos live with boesemani rainbowfish?

Verdict
Yes

Yes. Bristlenose plecos and boesemani rainbowfish make a good pair. Both are fine at 75–81°F. Plan on at least 30 gal.

Bristlenose plecoBristlenose pleco73–81°F · pH 6.5–7.5 Boesemani rainbowfishBoesemani rainbowfish75–82°F · pH 7–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–81°Bristlenose pleco 73–81°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–7.5Bristlenose pleco 6.5–7.5Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Bristlenose pleco · 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

Bristlenose plecoBoesemani rainbowfish
Temperature73–81 °F75–82 °F
pH6.5–7.57–8
Adult size5.0 in4.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietHerbivoreOmnivore

Better tank mates for bristlenose plecos

All bristlenose pleco tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can bristlenose plecos live with boesemani rainbowfish?

Yes. Bristlenose plecos and boesemani rainbowfish make a good pair. Both are fine at 75–81°F. Plan on at least 30 gal.

What temperature suits both bristlenose plecos and boesemani rainbowfish?

75–81 °F. Bristlenose plecos need 73–81 °F, boesemani rainbowfish need 75–82 °F.

What size tank do bristlenose plecos and boesemani rainbowfish need together?

At least 30 gal, set by the bristlenose pleco. Add space for each extra fish.