If you have a main tank that is not drilled, use an overflow box that comes with a sponge filter for your mechanical filtration. Then all you have to do for your wet/dry is add a submersible pump to the bottom of the hex tank, then fill it with scrubbies. You can either make a drip tray using the new plastic peg board or my ghetto way is to just use a coil of hose with a bunch of holes drilled in it. I used plastic ties to secure the hose in an evenly spaced coil.
Good luck, and keep us posted.