Can harlequin rasboras live with glowlight tetras?

Verdict
Yes

Yes. Harlequin rasboras and glowlight tetras get along in the same tank. Both are fine at 74–80°F. Plan on at least 10 gal.

Harlequin rasboraHarlequin rasbora72–80°F · pH 6–7.5 Glowlight tetraGlowlight tetra74–80°F · pH 6–7.5

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–80°Harlequin rasbora 72–80°Glowlight tetra 74–80°
The green band is the temperature range both can live in.
456789Both: 6–7.5Harlequin rasbora 6–7.5Glowlight tetra 6–7.5
The green band is the pH both tolerate.

Size to scale

Harlequin rasbora · 2 inGlowlight tetra · 1.5 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 rasboraGlowlight tetra
Temperature72–80 °F74–80 °F
pH6–7.56–7.5
Adult size2.0 in1.5 in
Minimum tank10 gal10 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 glowlight tetras

All glowlight tetra tank mates

Questions

Can harlequin rasboras live with glowlight tetras?

Yes. Harlequin rasboras and glowlight tetras get along in the same tank. Both are fine at 74–80°F. Plan on at least 10 gal.

What temperature suits both harlequin rasboras and glowlight tetras?

74–80 °F. Harlequin rasboras need 72–80 °F, glowlight tetras need 74–80 °F.

What size tank do harlequin rasboras and glowlight tetras need together?

At least 10 gal, set by the harlequin rasbora. Add space for each extra fish.