Can bristlenose plecos live with siamese algae eaters?

Verdict
Yes

Yes. Bristlenose plecos and siamese algae eaters get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

Bristlenose plecoBristlenose pleco73–81°F · pH 6.5–7.5 Siamese algae eaterSiamese algae eater75–79°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–79°Bristlenose pleco 73–81°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Bristlenose pleco 6.5–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Bristlenose pleco · 5 inSiamese algae eater · 6 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

Bristlenose plecoSiamese algae eater
Temperature73–81 °F75–79 °F
pH6.5–7.56.5–7.5
Adult size5.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atBottomBottom
GroupAlone or in pairsAlone or in pairs
DietHerbivoreHerbivore

Better tank mates for bristlenose plecos

All bristlenose pleco tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can bristlenose plecos live with siamese algae eaters?

Yes. Bristlenose plecos and siamese algae eaters get along in the same tank. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both bristlenose plecos and siamese algae eaters?

75–79 °F. Bristlenose plecos need 73–81 °F, siamese algae eaters need 75–79 °F.

What size tank do bristlenose plecos and siamese algae eaters need together?

At least 30 gal, set by the bristlenose pleco. Add space for each extra fish.