The Filter-Max Pre-Filter filters the
water before it reaches the main filter. It provides both mechanical and
biological filtration. Aerobic bacteria colonize the sponge, providing a
bacterial substrate to facilitate the nitrogen cycle.
An advantage of using the Filter-Max is it maintains the biological filtration
when the main filter is changed or cleaned. It also prevents debris such as dead
fish and plant material from clogging the intake by distributing the suction
evenly down the length of the sponge. It prevents small or baby fish, anemones
and invertebrates from being suctioned into the main filter.
The Filter-Max can be used with most outside power filters, cannister filters
and power heads. It includes three adapter for use with various main filter
intake tubes. It can be used in the vertical or horizontal position.