Can plecos live with severums?

Verdict
Yes

Yes, plecos and severums can live together. Both are fine at 74–84°F. Plan on at least 125 gal.

Common plecoCommon pleco72–86°F · pH 6.5–7.5 SeverumSeverum74–84°F · pH 6–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–84°Common pleco 72–86°Severum 74–84°
The green band is the temperature range both can live in.
456789Both: 6.5–7Common pleco 6.5–7.5Severum 6–7
The green band is the pH both tolerate.

Size to scale

Common pleco · 15 inSeverum · 8 in0"2"4"6"8"10"12"14"
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

Common plecoSeverum
Temperature72–86 °F74–84 °F
pH6.5–7.56–7
Adult size15.0 in8.0 in
Minimum tank125 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomMiddle
GroupAlone or in pairsAlone or in pairs
DietHerbivoreOmnivore

Better tank mates for plecos

All common pleco tank mates

Better tank mates for severums

All severum tank mates

Questions

Can plecos live with severums?

Yes, plecos and severums can live together. Both are fine at 74–84°F. Plan on at least 125 gal.

What temperature suits both plecos and severums?

74–84 °F. Plecos need 72–86 °F, severums need 74–84 °F.

What size tank do plecos and severums need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.