Can bolivian rams live with flowerhorns?

Verdict
No

No. Bolivian rams and flowerhorns should not share a tank. No shared temperature. Bolivian rams need 72–79°F, flowerhorns need 80–89°F.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Bolivian ram 72–79°Flowerhorn 80–89°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 7–7.5Bolivian ram 6–7.5Flowerhorn 7–8
The green band is the pH both tolerate.

Size to scale

Bolivian ram · 3 inFlowerhorn · 12 in0"2"4"6"8"10"12"
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

Bolivian ramFlowerhorn
Temperature72–79 °F80–89 °F
pH6–7.57–8
Adult size3.0 in12.0 in
Minimum tank20 gal75 gal
TemperamentPeacefulAggressive
Swims atBottomMiddle
GroupAlone or in pairsOne per tank
DietOmnivoreCarnivore

Better tank mates for bolivian rams

All bolivian ram tank mates

Questions

Can bolivian rams live with flowerhorns?

No. Bolivian rams and flowerhorns should not share a tank. No shared temperature. Bolivian rams need 72–79°F, flowerhorns need 80–89°F.

What temperature suits both bolivian rams and flowerhorns?

None. Bolivian rams need 72–79 °F and flowerhorns need 80–89 °F, so the ranges do not meet.

What size tank do bolivian rams and flowerhorns need together?

At least 75 gal, set by the flowerhorn. Add space for each extra fish.