Can red tail sharks live with tinfoil barbs?

Verdict
Yes

Yes, red tail sharks and tinfoil barbs can live together. Both are fine at 72–79°F. Plan on at least 125 gal.

Red tail sharkRed tail shark72–79°F · pH 6.5–7.5 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: 72–79°Red tail shark 72–79°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Red tail shark 6.5–7.5Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Red tail shark · 5 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

Red tail sharkTinfoil barb
Temperature72–79 °F72–80 °F
pH6.5–7.56.5–7.5
Adult size5.0 in12.0 in
Minimum tank55 gal125 gal
TemperamentSemi-aggressivePeaceful
Swims atBottomMiddle
GroupOne per tankGroups of 5+
DietOmnivoreOmnivore

Better tank mates for red tail sharks

All red tail shark tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can red tail sharks live with tinfoil barbs?

Yes, red tail sharks and tinfoil barbs can live together. Both are fine at 72–79°F. Plan on at least 125 gal.

What temperature suits both red tail sharks and tinfoil barbs?

72–79 °F. Red tail sharks need 72–79 °F, tinfoil barbs need 72–80 °F.

What size tank do red tail sharks and tinfoil barbs need together?

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