Can glass catfish live with harlequin rasboras?

Verdict
Yes

Yes, glass catfish and harlequin rasboras can live together. Both are fine at 75–80°F. Plan on at least 30 gal.

Glass catfishGlass catfish75–80°F · pH 6.5–7.5 Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–80°Glass catfish 75–80°Harlequin rasbora 72–80°
The green band is the temperature range both can live in.
456789Both: 6.5–7.5Glass catfish 6.5–7.5Harlequin rasbora 6–7.5
The green band is the pH both tolerate.

Size to scale

Glass catfish · 3 inHarlequin rasbora · 2 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

Glass catfishHarlequin rasbora
Temperature75–80 °F72–80 °F
pH6.5–7.56–7.5
Adult size3.0 in2.0 in
Minimum tank30 gal10 gal
TemperamentPeacefulPeaceful
Swims atMiddleMiddle
GroupGroups of 6+Groups of 6+
DietCarnivoreOmnivore

Better tank mates for glass catfish

All glass catfish tank mates

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Questions

Can glass catfish live with harlequin rasboras?

Yes, glass catfish and harlequin rasboras can live together. Both are fine at 75–80°F. Plan on at least 30 gal.

What temperature suits both glass catfish and harlequin rasboras?

75–80 °F. Glass catfish need 75–80 °F, harlequin rasboras need 72–80 °F.

What size tank do glass catfish and harlequin rasboras need together?

At least 30 gal, set by the glass catfish. Add space for each extra fish.