Can zebra danios live with cardinal tetras?

Verdict
Yes, with care

Yes, with care. Zebra danios and cardinal tetras can share a tank, but watch one thing. They only share 76–77°F. Keep the heater set there and steady.

Zebra danioZebra danio65–77°F · pH 6.5–8 Cardinal tetraCardinal tetra76–84°F · pH 4.6–7

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–77°Zebra danio 65–77°Cardinal tetra 76–84°
The green band is the temperature range both can live in.
456789Both: 6.5–7Zebra danio 6.5–8Cardinal tetra 4.6–7
The green band is the pH both tolerate.

Size to scale

Zebra danio · 2 inCardinal tetra · 2 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

Zebra danioCardinal tetra
Temperature65–77 °F76–84 °F
pH6.5–84.6–7
Adult size2.0 in2.0 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for zebra danios

All zebra danio tank mates

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Questions

Can zebra danios live with cardinal tetras?

Yes, with care. Zebra danios and cardinal tetras can share a tank, but watch one thing. They only share 76–77°F. Keep the heater set there and steady.

What temperature suits both zebra danios and cardinal tetras?

76–77 °F. Zebra danios need 65–77 °F, cardinal tetras need 76–84 °F.

What size tank do zebra danios and cardinal tetras need together?

At least 20 gal, set by the cardinal tetra. Add space for each extra fish.