Harlequin rasbora care

Water temperature

72–80°F

Keep harlequin rasboras at 72–80°F with a pH of 6–7.5, in a tank of at least 10 gallons. Good tank mates include bettas, guppies, angelfish.

Easy, calm schooler for almost any peaceful tank.

Trigonostigma heteromorpha

pH

6–7.5

Minimum tank

10 gal

Adult size

2.0 in

Temperament

Peaceful

Group

Groups of 6+

Lifespan

5–8 years

Swims at

Middle

Diet

Omnivore

Best tank mates

• BettaYes
• GuppyYes
• AngelfishYes
• Neon tetraYes
• CorydorasYes
• Honey gouramiYes
• Sparkling gouramiYes
• OtocinclusYes
• Bolivian ramYes
• Kuhli loachYes
• Dwarf gouramiYes
• Mystery snailYes

Full harlequin rasbora tank mate chart: 63 yes, 21 with care, 14 no

Harlequin rasbora water compared

Fish to keep away from harlequin rasboras

• Axolotl Axolotls are coldwater animals (60–66°F); harlequin rasboras need 72–80°F. No temperature suits both.
• Pictus catfish An adult pictus catfish eats fish that fit in its mouth, and at 2 inches harlequin rasboras do.
• Goldfish Goldfish are coldwater animals (60–74°F); harlequin rasboras need 72–80°F. They overlap only at 72–74°F, the edge of both ranges.
• Oscar An adult oscar eats fish that fit in its mouth, and at 2 inches harlequin rasboras do.
• Bichir An adult bichir eats fish that fit in its mouth, and at 2 inches harlequin rasboras do.
• Black ghost knife An adult black ghost knife eats fish that fit in its mouth, and at 2 inches harlequin rasboras do.
• Convict cichlid Convict cichlids are aggressive and will bully peaceful harlequin rasboras.
• Jack Dempsey An adult jack dempsey eats fish that fit in its mouth, and at 2 inches harlequin rasboras do.

More barbs, danios, rasboras and sharks

• Goldfish60–74°F
• Koi59–77°F
• Tiger barb72–81°F
• Red tail shark72–79°F
• Rainbow shark72–80°F
• Bala shark72–82°F
• Celestial pearl danio72–79°F
• Zebra danio65–77°F