Can firemouth cichlids live with boesemani rainbowfish?

Verdict
Yes

Yes, firemouth cichlids and boesemani rainbowfish can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

Firemouth cichlidFiremouth cichlid75–86°F · pH 6.5–8 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°Firemouth cichlid 75–86°Boesemani rainbowfish 75–82°
The green band is the temperature range both can live in.
456789Both: 7–8Firemouth cichlid 6.5–8Boesemani rainbowfish 7–8
The green band is the pH both tolerate.

Size to scale

Firemouth cichlid · 6 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

Firemouth cichlidBoesemani rainbowfish
Temperature75–86 °F75–82 °F
pH6.5–87–8
Adult size6.0 in4.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupAlone or in pairsGroups of 6+
DietOmnivoreOmnivore

Better tank mates for firemouth cichlids

All firemouth cichlid tank mates

Better tank mates for boesemani rainbowfish

All boesemani rainbowfish tank mates

Questions

Can firemouth cichlids live with boesemani rainbowfish?

Yes, firemouth cichlids and boesemani rainbowfish can live together. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both firemouth cichlids and boesemani rainbowfish?

75–82 °F. Firemouth cichlids need 75–86 °F, boesemani rainbowfish need 75–82 °F.

What size tank do firemouth cichlids and boesemani rainbowfish need together?

At least 30 gal, set by the firemouth cichlid. Add space for each extra fish.