Our Guide To Keeping Harlequin Rasbora Fish

1. About Fish Species:

   • Scientific name: Trigonostigma heteromorpha
   • Common name: Harlequin Rasbora
   • Family: Cyprinidae
   • Origin: Southeast Asia, specifically in Thailand, Malaysia, and Singapore
   • Adult length: 4 cm
   • Lifespan: 3 to 5 years

2. Tank Setup:

   • Harlequin Rasboras prefer a well-planted tank with areas of open swimming space. A minimum tank size of 60 cm (24 inches) is recommended.
   • They thrive in densely planted tanks with subdued lighting and a dark substrate to mimic their natural habitat.

3. Water Parameters:

   • Harlequin Rasboras prefer slightly acidic to neutral water conditions with a pH range of 6.0 to 7.0.
   • Keep the water temperature between 22 to 26°C (72 to 79°F).

4. Filtration and Water Flow:

   • They prefer gentle water flow, so choose a filter that provides low to moderate flow.

5. Diet:

   • Harlequin Rasboras are omnivores and will accept a variety of foods. Offer them a balanced diet consisting of high-quality flake or pellet food as a staple.
   • Supplement their diet with live or frozen foods like bloodworms, brine shrimp, and daphnia to provide essential nutrients and mimic their natural diet.

6. Tank mates:

   • Harlequin Rasboras are peaceful schooling fish and should be kept in groups of at least six individuals to prevent stress and encourage their natural behaviors.
   • They are compatible with other peaceful community fish such as other rasboras, tetras, peaceful barbs, and small catfish species.

7. Behavior and Compatibility:

   • Harlequin Rasboras are peaceful and active fish that do well in community tanks.
   • They may exhibit some fin-nipping behavior towards slow-moving fish with long fins, so avoid keeping them with such species.