Can rams live with red tail sharks?

Verdict
No

No. Rams and red tail sharks should not share a tank. No shared temperature. Rams need 80–86°F, red tail sharks need 72–79°F.

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°German blue ram 80–86°Red tail shark 72–79°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6.5–7German blue ram 5–7Red tail shark 6.5–7.5
The green band is the pH both tolerate.

Size to scale

German blue ram · 2.5 inRed tail shark · 5 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

German blue ramRed tail shark
Temperature80–86 °F72–79 °F
pH5–76.5–7.5
Adult size2.5 in5.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomBottom
GroupAlone or in pairsOne per tank
DietOmnivoreOmnivore

Better tank mates for rams

All german blue ram tank mates

Better tank mates for red tail sharks

All red tail shark tank mates

Questions

Can rams live with red tail sharks?

No. Rams and red tail sharks should not share a tank. No shared temperature. Rams need 80–86°F, red tail sharks need 72–79°F.

What temperature suits both rams and red tail sharks?

None. Rams need 80–86 °F and red tail sharks need 72–79 °F, so the ranges do not meet.

What size tank do rams and red tail sharks need together?

At least 55 gal, set by the red tail shark. Add space for each extra fish.