Can tiger barbs live with zebra loaches?

Verdict
Yes

Yes. Tiger barbs and zebra loaches get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 73–79°Tiger barb 72–81°Zebra loach 73–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Tiger barb 6–7.5Zebra loach 6–7.5
The green band is the pH both tolerate.

Size to scale

Tiger barb · 3 inZebra loach · 3.5 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 barbZebra loach
Temperature72–81 °F73–79 °F
pH6–7.56–7.5
Adult size3.0 in3.5 in
Minimum tank30 gal30 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleBottom
GroupGroups of 6+Groups of 5+
DietOmnivoreOmnivore

Better tank mates for tiger barbs

All tiger barb tank mates

Better tank mates for zebra loaches

All zebra loach tank mates

Questions

Can tiger barbs live with zebra loaches?

Yes. Tiger barbs and zebra loaches get along in the same tank. Both are fine at 73–79°F. Plan on at least 30 gal.

What temperature suits both tiger barbs and zebra loaches?

73–79 °F. Tiger barbs need 72–81 °F, zebra loaches need 73–79 °F.

What size tank do tiger barbs and zebra loaches need together?

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