Can guppies live with rosy barbs?

Verdict
No

No. Guppies and rosy barbs should not share a tank. Rosy barbs nip fins, and the long fins of guppies are an easy target.

GuppyGuppy72–82°F · pH 6.8–7.8 Rosy barbRosy barb64–77°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–77°Guppy 72–82°Rosy barb 64–77°
The green band is the temperature range both can live in.
456789Both: 6.8–7.5Guppy 6.8–7.8Rosy barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Guppy · 2 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

GuppyRosy barb
Temperature72–82 °F64–77 °F
pH6.8–7.86–7.5
Adult size2.0 in4.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atTopMiddle
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for rosy barbs

All rosy barb tank mates

Questions

Can guppies live with rosy barbs?

No. Guppies and rosy barbs should not share a tank. Rosy barbs nip fins, and the long fins of guppies are an easy target.

What temperature suits both guppies and rosy barbs?

72–77 °F. Guppies need 72–82 °F, rosy barbs need 64–77 °F.

What size tank do guppies and rosy barbs need together?

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