Can discus live with tiger barbs?

Verdict
No

No. Discus and tiger barbs should not share a tank. No shared temperature. Discus need 82–88°F, tiger barbs need 72–81°F.

DiscusDiscus82–88°F · pH 5.5–7 Tiger barbTiger barb72–81°F · pH 6–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Tiger barb 72–81°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6–7Discus 5.5–7Tiger barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inTiger barb · 3 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

DiscusTiger barb
Temperature82–88 °F72–81 °F
pH5.5–76–7.5
Adult size6.0 in3.0 in
Minimum tank55 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 5+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for tiger barbs

All tiger barb tank mates

Questions

Can discus live with tiger barbs?

No. Discus and tiger barbs should not share a tank. No shared temperature. Discus need 82–88°F, tiger barbs need 72–81°F.

What temperature suits both discus and tiger barbs?

None. Discus need 82–88 °F and tiger barbs need 72–81 °F, so the ranges do not meet.

What size tank do discus and tiger barbs need together?

At least 55 gal, set by the discus. Add space for each extra fish.