Can oscars live with tinfoil barbs?

Verdict
Yes

Yes, oscars and tinfoil barbs can live together. Both are fine at 74–80°F. Plan on at least 125 gal.

OscarOscar74–81°F · pH 6–8 Tinfoil barbTinfoil barb72–80°F · pH 6.5–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–80°Oscar 74–81°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Oscar 6–8Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Oscar · 12 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

OscarTinfoil barb
Temperature74–81 °F72–80 °F
pH6–86.5–7.5
Adult size12.0 in12.0 in
Minimum tank75 gal125 gal
TemperamentSemi-aggressivePeaceful
Swims atMiddleMiddle
GroupAlone or in pairsGroups of 5+
DietCarnivoreOmnivore

Better tank mates for oscars

All oscar tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can oscars live with tinfoil barbs?

Yes, oscars and tinfoil barbs can live together. Both are fine at 74–80°F. Plan on at least 125 gal.

What temperature suits both oscars and tinfoil barbs?

74–80 °F. Oscars need 74–81 °F, tinfoil barbs need 72–80 °F.

What size tank do oscars and tinfoil barbs need together?

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