Can guppies live with rams?

Verdict
Yes

Yes. Guppies and rams get along in the same tank. Both are fine at 80–82°F. Plan on at least 20 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 German blue ramGerman blue ram80–86°F · pH 5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 80–82°Guppy 72–82°German blue ram 80–86°
The green band is the temperature range both can live in.
456789Both: 6.8–7Guppy 6.8–7.8German blue ram 5–7
The green band is the pH both tolerate.

Size to scale

Guppy · 2 inGerman blue ram · 2.5 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

GuppyGerman blue ram
Temperature72–82 °F80–86 °F
pH6.8–7.85–7
Adult size2.0 in2.5 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 3+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for rams

All german blue ram tank mates

Questions

Can guppies live with rams?

Yes. Guppies and rams get along in the same tank. Both are fine at 80–82°F. Plan on at least 20 gal.

What temperature suits both guppies and rams?

80–82 °F. Guppies need 72–82 °F, rams need 80–86 °F.

What size tank do guppies and rams need together?

At least 20 gal, set by the german blue ram. Add space for each extra fish.