Abstract: An aquarium includes an air pump received in a base, a support has a lower end fixed to the base, a container is coupled to the upper end of the support, a hole is formed in the upper portion of the container for pouring water into the container, a check valve is disposed in the bottom portion of the container and has a lower end connected to the air pump for supplying air into the container. A number of light bulbs are disposed in the lower portion of the container for warming up the water contained in the container. The aquarium includes a compact configuration which is good for transportation purposes.