Can celestial pearl danios live with cardinal tetras?

Verdict
Yes

Yes. Celestial pearl danios and cardinal tetras make a good pair. Both are fine at 76–79°F. Plan on at least 20 gal.

Celestial pearl danioCelestial pearl danio72–79°F · pH 6.5–7.5 Cardinal tetraCardinal tetra76–84°F · pH 4.6–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 76–79°Celestial pearl danio 72–79°Cardinal tetra 76–84°
The green band is the temperature range both can live in.
456789Both: 6.5–7Celestial pearl danio 6.5–7.5Cardinal tetra 4.6–7
The green band is the pH both tolerate.

Size to scale

Celestial pearl danio · 1 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

Celestial pearl danioCardinal tetra
Temperature72–79 °F76–84 °F
pH6.5–7.54.6–7
Adult size1.0 in2.0 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for celestial pearl danios

All celestial pearl danio tank mates

Better tank mates for cardinal tetras

All cardinal tetra tank mates

Questions

Can celestial pearl danios live with cardinal tetras?

Yes. Celestial pearl danios and cardinal tetras make a good pair. Both are fine at 76–79°F. Plan on at least 20 gal.

What temperature suits both celestial pearl danios and cardinal tetras?

76–79 °F. Celestial pearl danios need 72–79 °F, cardinal tetras need 76–84 °F.

What size tank do celestial pearl danios and cardinal tetras need together?

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