Hey that's cheating! Your supposed to tell us you have them already
I'd run them 3/4 full and not use the densest foam, to help with flow.
I'm pretty sure media should be: water in - mechanical - biological. Using bio media first means it' becomes mechanical filtration. Mechanical is physical. Bio is for the chemicals in the water itself. Bio media can't work properly clogged with tank detritus. The bacteria is trying to clean the water while also trying to digest the detritus that could be simply trapped by the mechanical media and removed.