in my Aquaclear i've got one sponge (that came with it) and then loose biomax (any brand is pretty much good enough), and a piece of filter floss on top. works great. i usually replace the floss weekly during a water change, but this is a planted tank with wussy plants near the intake tube (yeah, my bad, lol) and it gets gunky in there.
I noticed the media looks new in the photos. is it all brand new and this is the only filter running on the tank? be prepared to do a fish in cycle, since there is no longer a filter full of good bacteria on the tank.