Can harlequin rasboras live with tinfoil barbs?

Verdict
Yes, with care

Yes, with care. Harlequin rasboras and tinfoil barbs can share a tank, but watch one thing. At 12 inches a tinfoil barb can swallow a small harlequin rasbora. Fast, alert fish usually stay out of reach.

Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5 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°Both: 72–80°Harlequin rasbora 72–80°Tinfoil barb 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Harlequin rasbora 6–7.5Tinfoil barb 6.5–7.5
The green band is the pH both tolerate.

Size to scale

Harlequin rasbora · 2 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

Harlequin rasboraTinfoil barb
Temperature72–80 °F72–80 °F
pH6–7.56.5–7.5
Adult size2.0 in12.0 in
Minimum tank10 gal125 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 5+
DietOmnivoreOmnivore

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Better tank mates for tinfoil barbs

All tinfoil barb tank mates

Questions

Can harlequin rasboras live with tinfoil barbs?

Yes, with care. Harlequin rasboras and tinfoil barbs can share a tank, but watch one thing. At 12 inches a tinfoil barb can swallow a small harlequin rasbora. Fast, alert fish usually stay out of reach.

What temperature suits both harlequin rasboras and tinfoil barbs?

72–80 °F. Harlequin rasboras need 72–80 °F, tinfoil barbs need 72–80 °F.

What size tank do harlequin rasboras and tinfoil barbs need together?

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