Can rams live with severums?

Verdict
Yes

Yes. Rams and severums get along in the same tank. Both are fine at 80–84°F. Plan on at least 55 gal.

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–84°German blue ram 80–86°Severum 74–84°
The green band is the temperature range both can live in.
456789Both: 6–7German blue ram 5–7Severum 6–7
The green band is the pH both tolerate.

Size to scale

German blue ram · 2.5 inSeverum · 8 in0"1"2"3"4"5"6"7"8"
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 ramSeverum
Temperature80–86 °F74–84 °F
pH5–76–7
Adult size2.5 in8.0 in
Minimum tank20 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsAlone or in pairs
DietOmnivoreOmnivore

Better tank mates for rams

All german blue ram tank mates

Better tank mates for severums

All severum tank mates

Questions

Can rams live with severums?

Yes. Rams and severums get along in the same tank. Both are fine at 80–84°F. Plan on at least 55 gal.

What temperature suits both rams and severums?

80–84 °F. Rams need 80–86 °F, severums need 74–84 °F.

What size tank do rams and severums need together?

At least 55 gal, set by the severum. Add space for each extra fish.