Can clown loaches live with harlequin rasboras?

Verdict

Yes, with care

Yes, with care. Clown loaches and harlequin rasboras can share a tank, but watch one thing. A grown clown loach may treat small harlequin rasboras as food, especially at night.

Clown loach77–86°F · pH 6–7.5

Harlequin rasbora72–80°F · pH 6–7.5

What to watch

Watch outA grown clown loach may treat small harlequin rasboras as food, especially at night.
Watch outClown loaches grow to 8 inches and need 75 gallons, far more than a tank set up for harlequin rasboras.

What works

Both are fine at 77–80°F.
pH 6–7.5 suits both.
They use different parts of the tank: clown loaches the bottom, harlequin rasboras the mid.

Water side by side

The green band is the temperature range both can live in.

The green band is the pH both tolerate.

Size to scale

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

	Clown loach	Harlequin rasbora
Temperature	77–86 °F	72–80 °F
pH	6–7.5	6–7.5
Adult size	8.0 in	2.0 in
Minimum tank	75 gal	10 gal
Temperament	Peaceful	Peaceful
Swims at	Bottom	Middle
Group	Groups of 5+	Groups of 6+
Diet	Omnivore	Omnivore

Better tank mates for clown loaches

All clown loach tank mates

Better tank mates for harlequin rasboras

All harlequin rasbora tank mates

Questions

Can clown loaches live with harlequin rasboras?

Yes, with care. Clown loaches and harlequin rasboras can share a tank, but watch one thing. A grown clown loach may treat small harlequin rasboras as food, especially at night.

What temperature suits both clown loaches and harlequin rasboras?

77–80 °F. Clown loaches need 77–86 °F, harlequin rasboras need 72–80 °F.

What size tank do clown loaches and harlequin rasboras need together?

At least 75 gal, set by the clown loach. Add space for each extra fish.