Can guppies live with clown plecos?

Verdict
Yes

Yes. Guppies and clown plecos make a good pair. Both are fine at 73–82°F. Plan on at least 20 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 Clown plecoClown pleco73–82°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–82°Guppy 72–82°Clown pleco 73–82°
The green band is the temperature range both can live in.
456789Both: 6.8–7.5Guppy 6.8–7.8Clown pleco 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Guppy · 2 inClown pleco · 3.5 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

GuppyClown pleco
Temperature72–82 °F73–82 °F
pH6.8–7.86.5–7.5
Adult size2.0 in3.5 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 3+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for clown plecos

All clown pleco tank mates

Questions

Can guppies live with clown plecos?

Yes. Guppies and clown plecos make a good pair. Both are fine at 73–82°F. Plan on at least 20 gal.

What temperature suits both guppies and clown plecos?

73–82 °F. Guppies need 72–82 °F, clown plecos need 73–82 °F.

What size tank do guppies and clown plecos need together?

At least 20 gal, set by the clown pleco. Add space for each extra fish.