Can congo tetras live with severums?

Verdict
Yes

Yes. Congo tetras and severums get along in the same tank. Both are fine at 74–82°F. Plan on at least 55 gal.

Congo tetraCongo tetra73–82°F · pH 6–7.5 SeverumSeverum74–84°F · pH 6–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–82°Congo tetra 73–82°Severum 74–84°
The green band is the temperature range both can live in.
456789Both: 6–7Congo tetra 6–7.5Severum 6–7
The green band is the pH both tolerate.

Size to scale

Congo tetra · 3 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

Congo tetraSeverum
Temperature73–82 °F74–84 °F
pH6–7.56–7
Adult size3.0 in8.0 in
Minimum tank30 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for congo tetras

All congo tetra tank mates

Better tank mates for severums

All severum tank mates

Questions

Can congo tetras live with severums?

Yes. Congo tetras and severums get along in the same tank. Both are fine at 74–82°F. Plan on at least 55 gal.

What temperature suits both congo tetras and severums?

74–82 °F. Congo tetras need 73–82 °F, severums need 74–84 °F.

What size tank do congo tetras and severums need together?

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