Harlequin rasboras are shown here. Rasboras are some of the easiest fish to take care of in an aquarium. Based on these basic facts and care tips, it's easy to see why these are popular fish for beginners.

Rasboras are perfect for beginning enthusiasts, as they are among the easiest fish to take care of.  They are also colorful, peaceful creatures that are fun to watch, especially in large schools.

When you consider the following basic facts about rasboras’ appearance, characteristics, and care needs, it’s easy to see why they are so popular.

1. Some of the most popular types of rasboras for aquariums include:

  • Clown Rasboras
  • Redtail/Black Line Rasboras
  • Harlequin Rasboras
  • Scissortail Rasboras
  • Dwarf Rasboras

2. They like live food, but would do just fine with flake food if you didn’t have time to restock.

3. They are freshwater tropical fish in the carp family, Cyprinidae.

4. They are slender and have a slightly protruding lower jaw.

Like these glowlight rasboras, rasbora fish have slender bodies and protruding lower jaws.
Rasbora fish have slender bodies and slightly protruding jaws, and they only grow to about 2 inches, as seen here in this image of glowlight rasboras.

5. Although a few rasbora fish can grow to 4 inches, adult rasboras are usually only about 2 inches long, making them ideal for beginning hobbyists with small- or medium-sized tanks. Some species only grow to about an inch long, so they’re suitable for nano tanks as well.

6. Because they are schooling fish, you should purchase them in groups, and the more the merrier. You should start with at least seven to 10.

7. In nature, they can be found in Asia and southeast China in forest streams and floodplains.

8. Their aquariums should include plenty of plants. In fact, their habitat may look murky due to the vegetation.

9. They’re so low maintenance that the pH level in their natural habitat can be as low as 4.0. Commercially raised rasbora fish, however, require a level closer to the more typical 6.8 to 7.8.

10. Alkalinity should be between 50 ppm and 140 ppm.

11. The temperature of the tank can be rather warm, approximately 75 to 80 degrees.

12. They’re peaceful fish, so you won’t have to worry too much about aquarium quarrels. They generally get along with each other and other fish that are similar to them in size and character.

Although rasboras are some of the easiest fish to take care of, regular water changes using RODI water can help you maintain a clean yet balanced environment. Contact us for more information about fish tank maintenance and how to keep your rasbora fish happy as can be.

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