Our favorite small aquarium for most people is the Fluval Flex 9-gallon Aquarium Kit, which includes everything your new betta, shrimp or school of small fish needs for a long and stable life.

Why Small Fish Are Perfect for Home Aquariums Small fish might be tiny in size, but they bring massive personality, beauty, ...

Even so, with dimensions of just 370 x 250 x 290mm (14.6 x 9.8 x 11.4 inches), only about half of which is taken up by the tank itself, you’ll want to keep the occupants on the very small side.