Shane the way I have it planned is that the AIO back section will be about 4 inches off the back wall of the tank. It will have a skimmer that will be made out of 4 inch cast acrylic tube that is feed by a small PH pump. It will also have another reactor that will be feed by a PH that will be used for carbon/gfo/what ever the person prefers using that will also act like the return upon it exit.
Mike
Mike