Mechanical filtration

In mechanical filtration, water is passed through a thin sponge or a screen, which
removes the debris. The size of the debris that can be trapped and the time required to
filter out the water depends on the quality and the density of the material used, as well as
on the power of the pump head. In the course of time, these filters will get clogged and
will need to be cleaned. Thus, mechanical filters help to clear out larger particulate matter
from the aquarium. Under gravel filters are a type of mechanical filters that uses the
aquarium gravel as filter material and trap the debris among the gravel