Can discus live with tinfoil barbs?

Verdict
No

No. Discus and tinfoil barbs should not share a tank. No shared temperature. Discus need 82–88°F, tinfoil barbs need 72–80°F.

DiscusDiscus82–88°F · pH 5.5–7 Tinfoil barbTinfoil barb72–80°F · pH 6.5–7.5

What to watch

What works

Water side by side

55°60°65°70°75°80°85°90°Discus 82–88°Tinfoil barb 72–80°
The ranges do not meet, so one of them would always be too warm or too cold.
456789Both: 6.5–7Discus 5.5–7Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Discus · 6 inTinfoil barb · 12 in0"2"4"6"8"10"12"
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

DiscusTinfoil barb
Temperature82–88 °F72–80 °F
pH5.5–76.5–7.5
Adult size6.0 in12.0 in
Minimum tank55 gal125 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 5+Groups of 5+
DietCarnivoreOmnivore

Better tank mates for discus

All discus tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can discus live with tinfoil barbs?

No. Discus and tinfoil barbs should not share a tank. No shared temperature. Discus need 82–88°F, tinfoil barbs need 72–80°F.

What temperature suits both discus and tinfoil barbs?

None. Discus need 82–88 °F and tinfoil barbs need 72–80 °F, so the ranges do not meet.

What size tank do discus and tinfoil barbs need together?

At least 125 gal, set by the tinfoil barb. Add space for each extra fish.