Can tiger barbs live with siamese algae eaters?

Verdict
Yes

Yes, tiger barbs and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 30 gal.

Tiger barbTiger barb72–81°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: 75–79°Tiger barb 72–81°Siamese algae eater 75–79°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Tiger barb 6–7.5Siamese algae eater 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 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

Tiger barbSiamese algae eater
Temperature72–81 °F75–79 °F
pH6–7.56.5–7.5
Adult size3.0 in6.0 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupGroups of 6+Alone or in pairs
DietOmnivoreHerbivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for siamese algae eaters

All siamese algae eater tank mates

Questions

Can tiger barbs live with siamese algae eaters?

Yes, tiger barbs and siamese algae eaters can live together. Both are fine at 75–79°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and siamese algae eaters?

75–79 °F. Tiger barbs need 72–81 °F, siamese algae eaters need 75–79 °F.

What size tank do tiger barbs and siamese algae eaters need together?

At least 30 gal, set by the tiger barb. Add space for each extra fish.