The invention relates to an aquarium comprising a water tank and a sieve
that is arranged in the water tank; the sieve comprises a filter and a
driving mechanism supplying power to the filter. The filter is disposed
in the internal part of a container of the water tank, while the driving
mechanism is disposed outside the container of the water tank.
Consequently, the invention can effectively allow the power source of a
conducting wire of the sieve of the aquarium to avoid getting into the
container of the water tank; in addition, it can eliminate the
possibility of electric leakage of said conducting wire underwater in the
container of the water tank.