Can pearl gouramis live with siamese algae eaters?

Verdict
Yes

Yes, pearl gouramis and siamese algae eaters can live together. Both are fine at 77–79°F. Plan on at least 30 gal.

Pearl gouramiPearl gourami77–82°F · pH 6–7.5 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: 77–79°Pearl gourami 77–82°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Pearl gourami 6–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Pearl gourami · 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

Pearl gouramiSiamese algae eater
Temperature77–82 °F75–79 °F
pH6–7.56.5–7.5
Adult size5.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentPeacefulPeaceful
Swims atTopBottom
GroupAlone or in pairsAlone or in pairs
DietOmnivoreHerbivore

Better tank mates for pearl gouramis

All pearl gourami tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can pearl gouramis live with siamese algae eaters?

Yes, pearl gouramis and siamese algae eaters can live together. Both are fine at 77–79°F. Plan on at least 30 gal.

What temperature suits both pearl gouramis and siamese algae eaters?

77–79 °F. Pearl gouramis need 77–82 °F, siamese algae eaters need 75–79 °F.

What size tank do pearl gouramis and siamese algae eaters need together?

At least 30 gal, set by the pearl gourami. Add space for each extra fish.