ok i have an atman cf 600 filter.

i do not know about other filters but here is what the structure is

there is an inlet that lets dirty water flow to the bottom.

from the bottom, there is 3 inches of space, then tray 2 ,followed by tray 1.

and ontop is a thin acrylic slate(with holes)

my question is what do i layer it with

i am thinking 2nd tray is thik black foam with white filter wool then load in top tray and fill that with ceramic rings.


any other media i am missing out?