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Betta, or Siamese fighting, fish are among "the most popular freshwater aquarium fish in the world," PetMD reports. Native to southeast Asia, this species is known for its range of vibrant hues.

she suggests purchasing betta-specific decor and plenty of rest spots, such as hammocks for your fish. Do you need to test your aquarium water? According to Sanders, water quality is “the most ...

Algae-cleaning fish keep aquariums clean by eating algae. They help keep the water clear and create a healthy environment for other fish. Tap to read in detail.