Can celestial pearl danios live with rosy barbs?

Verdict
Yes

Yes. Celestial pearl danios and rosy barbs make a good pair. Both are fine at 72–77°F. Plan on at least 30 gal.

Celestial pearl danioCelestial pearl danio72–79°F · pH 6.5–7.5 Rosy barbRosy barb64–77°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Celestial pearl danio 72–79°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Celestial pearl danio 6.5–7.5Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Celestial pearl danio · 1 inRosy barb · 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

Celestial pearl danioRosy barb
Temperature72–79 °F64–77 °F
pH6.5–7.56–7.5
Adult size1.0 in4.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulSemi-aggressive
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 rosy barbs

All rosy barb tank mates

Questions

Can celestial pearl danios live with rosy barbs?

Yes. Celestial pearl danios and rosy barbs make a good pair. Both are fine at 72–77°F. Plan on at least 30 gal.

What temperature suits both celestial pearl danios and rosy barbs?

72–77 °F. Celestial pearl danios need 72–79 °F, rosy barbs need 64–77 °F.

What size tank do celestial pearl danios and rosy barbs need together?

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