Can cardinal tetras live with odessa barbs?

Verdict
Yes

Yes. Cardinal tetras and odessa barbs get along in the same tank. Both are fine at 76–79°F. Plan on at least 30 gal.

Cardinal tetraCardinal tetra76–84°F · pH 4.6–7 Odessa barbOdessa barb70–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–79°Cardinal tetra 76–84°Odessa barb 70–79°
The green band is the temperature range both can live in.
456789Both: 6–7Cardinal tetra 4.6–7Odessa barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Cardinal tetra · 2 inOdessa barb · 3 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 tetraOdessa barb
Temperature76–84 °F70–79 °F
pH4.6–76–7.5
Adult size2.0 in3.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Better tank mates for odessa barbs

All odessa barb tank mates

Questions

Can cardinal tetras live with odessa barbs?

Yes. Cardinal tetras and odessa barbs get along in the same tank. Both are fine at 76–79°F. Plan on at least 30 gal.

What temperature suits both cardinal tetras and odessa barbs?

76–79 °F. Cardinal tetras need 76–84 °F, odessa barbs need 70–79 °F.

What size tank do cardinal tetras and odessa barbs need together?

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