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The harlequin rasbora is a small fish in the family Cyprinidae. The species became an instant favorite among aquarists after its introduction in the early 1900s and is the best known and most widely kept species among the rasboras. The harlequin rasbora is popular with aquarists because of its schooling behavior and vibrant colors. Harlequin rasboras are a great choice for a smaller community tank and are suitable for beginner aquarists. The natural habitat of this species consists of soft, slightly acidic water and slow water movements. These fish prefer environments with dense vegetation, an open area for swimming, dark substrate, and low-light conditions.
The species is found in slightly acidic waters, so the pH level inside the tank should be in the 6.0–7.8 range — ideally 6.5. The aquarium should be filled with fresh water at a 2–15 dGH water hardness level, and no brackish water should be present. Harlequin rasboras adapt to most aquarium conditions, but their colors show best in soft, slightly acidic water conditions.
Due to their extremely peaceful behaviour harlequin rasbora are great to include in community aquariums. They can be kept with a wide range of tetras, gourami and other common smaller fish species.
The Team at Melbourne Tropical Fish receives weekly shipments of various species of fish, whilst this order changes every week and we can special order in many species of fish and Harlequin Rasboras are among our favourites.