Can guppies live with kuhli loaches?

Verdict
Yes

Yes. Guppies and kuhli loaches get along in the same tank. Both are fine at 75–82°F. Plan on at least 20 gal.

GuppyGuppy72–82°F · pH 6.8–7.8 Kuhli loachKuhli loach75–86°F · pH 5.5–7

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Guppy 72–82°Kuhli loach 75–86°
The green band is the temperature range both can live in.
456789Both: 6.8–7Guppy 6.8–7.8Kuhli loach 5.5–7
The green band is the pH both tolerate.

Size to scale

Guppy · 2 inKuhli loach · 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

GuppyKuhli loach
Temperature72–82 °F75–86 °F
pH6.8–7.85.5–7
Adult size2.0 in3.5 in
Minimum tank10 gal20 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupGroups of 3+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for kuhli loaches

All kuhli loach tank mates

Questions

Can guppies live with kuhli loaches?

Yes. Guppies and kuhli loaches get along in the same tank. Both are fine at 75–82°F. Plan on at least 20 gal.

What temperature suits both guppies and kuhli loaches?

75–82 °F. Guppies need 72–82 °F, kuhli loaches need 75–86 °F.

What size tank do guppies and kuhli loaches need together?

At least 20 gal, set by the kuhli loach. Add space for each extra fish.