Clean
                        water is continuously
                        fed into the tank.
                     
                    Surface Skimmer. The water from
                        the tank spills over into the surface
                        skimmer, which feeds the water through a
                        mechanical filter. This filter removes
                        unwanted particles and debris. The water
                        is taken from the top of the tank to
                        provide oxygenated water to the bio
                        filter area.
                     
                    Biofilter. This area is
                        made up of many high surface area
                        'bioballs', and they are kept wet by the
                        continous flow of water over them from
                        the surface skimmer. The bioballs provide
                        ideal growing conditions for benefical
                        bacteria, which clean the water of
                        biological impurities.
                     
                    This
                        area provides an overflow capacity, so
                        that if there is a power failure, the
                        excess water from the tank flows into
                        this area.
                     
                    The pump. This unit
                        drives the water through the system.
                     
                    The chiller. This unit,
                        which is optional, depending on the
                        specimens kept, will cool the water to an
                        ideal temperature.
                     
                    The
                        cleaned
                        and conditioned water is then fed back
                        to the tank.