Can guppies live with plecos?

Verdict

Yes, with care

Yes, with care. Guppies and plecos can share a tank, but watch one thing. Plecos grow to 15 inches and need 125 gallons, far more than a tank set up for guppies.

Guppy72–82°F · pH 6.8–7.8

Common pleco72–86°F · pH 6.5–7.5

What to watch

Watch outPlecos grow to 15 inches and need 125 gallons, far more than a tank set up for guppies.

What works

Both are fine at 72–82°F.
pH 6.8–7.5 suits both.
They use different parts of the tank: guppies the top, plecos the bottom.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

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

	Guppy	Common pleco
Temperature	72–82 °F	72–86 °F
pH	6.8–7.8	6.5–7.5
Adult size	2.0 in	15.0 in
Minimum tank	10 gal	125 gal
Temperament	Peaceful	Peaceful
Swims at	Top	Bottom
Group	Groups of 3+	Alone or in pairs
Diet	Omnivore	Herbivore

Better tank mates for guppies

All guppy tank mates

Better tank mates for plecos