Can cardinal tetras live with kribensis?

Verdict
Yes

Yes, cardinal tetras and kribensis can live together. Both are fine at 76–80°F. Plan on at least 30 gal.

Cardinal tetraCardinal tetra76–84°F · pH 4.6–7 KribensisKribensis75–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–80°Cardinal tetra 76–84°Kribensis 75–80°
The green band is the temperature range both can live in.
456789Both: 6–7Cardinal tetra 4.6–7Kribensis 6–7.5
The green band is the pH both tolerate.

Size to scale

Cardinal tetra · 2 inKribensis · 4 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

Cardinal tetraKribensis
Temperature76–84 °F75–80 °F
pH4.6–76–7.5
Adult size2.0 in4.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Better tank mates for kribensis

All kribensis tank mates

Questions

Can cardinal tetras live with kribensis?

Yes, cardinal tetras and kribensis can live together. Both are fine at 76–80°F. Plan on at least 30 gal.

What temperature suits both cardinal tetras and kribensis?

76–80 °F. Cardinal tetras need 76–84 °F, kribensis need 75–80 °F.

What size tank do cardinal tetras and kribensis need together?

At least 30 gal, set by the kribensis. Add space for each extra fish.