Can harlequin rasboras live with odessa barbs?

Verdict
Yes

Yes. Harlequin rasboras and odessa barbs make a good pair. Both are fine at 72–79°F. Plan on at least 30 gal.

Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5 Odessa barbOdessa barb70–79°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 72–79°Harlequin rasbora 72–80°Odessa barb 70–79°
The green band is the temperature range both can live in.
456789Both: 6–7.5Harlequin rasbora 6–7.5Odessa barb 6–7.5
The green band is the pH both tolerate.

Size to scale

Harlequin rasbora · 2 inOdessa 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

Harlequin rasboraOdessa barb
Temperature72–80 °F70–79 °F
pH6–7.56–7.5
Adult size2.0 in3.0 in
Minimum tank10 gal30 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietOmnivoreOmnivore

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Better tank mates for odessa barbs

All odessa barb tank mates

Questions

Can harlequin rasboras live with odessa barbs?

Yes. Harlequin rasboras and odessa barbs make a good pair. Both are fine at 72–79°F. Plan on at least 30 gal.

What temperature suits both harlequin rasboras and odessa barbs?

72–79 °F. Harlequin rasboras need 72–80 °F, odessa barbs need 70–79 °F.

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

At least 30 gal, set by the odessa barb. Add space for each extra fish.