Can plecos live with yellow labs?

Verdict
Yes, with care

Yes, with care. Plecos and yellow labs can share a tank, but watch one thing. Different water: plecos want pH 6.5–7.5, yellow labs want pH 7.8–8.6.

Common plecoCommon pleco72–86°F · pH 6.5–7.5 Electric yellow cichlidElectric yellow cichlid75–82°F · pH 7.8–8.6

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Common pleco 72–86°Electric yellow cichlid 75–82°
The green band is the temperature range both can live in.
456789Common pleco 6.5–7.5Electric yellow cichlid 7.8–8.6
No pH suits both. One would live in the wrong water all the time.

Size to scale

Common pleco · 15 inElectric yellow cichlid · 4 in0"2"4"6"8"10"12"14"
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

Common plecoElectric yellow cichlid
Temperature72–86 °F75–82 °F
pH6.5–7.57.8–8.6
Adult size15.0 in4.0 in
Minimum tank125 gal40 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomAll levels
GroupAlone or in pairsGroups of 4+
DietHerbivoreOmnivore

Better tank mates for plecos

All common pleco tank mates

Better tank mates for yellow labs

All electric yellow cichlid tank mates

Questions

Can plecos live with yellow labs?

Yes, with care. Plecos and yellow labs can share a tank, but watch one thing. Different water: plecos want pH 6.5–7.5, yellow labs want pH 7.8–8.6.

What temperature suits both plecos and yellow labs?

75–82 °F. Plecos need 72–86 °F, yellow labs need 75–82 °F.

What size tank do plecos and yellow labs need together?

At least 125 gal, set by the common pleco. Add space for each extra fish.