remote rdsb

i've considered a remote rdsb on a brute container for my 90 gal sps dominated.. thing is how do i go about this thing..i really need help on designing this thing because the sand bed will be going bad at some point and i want to know how i can actually get a look at it when its in a brute ... also am i going over the top with the size or what.. drilling the brute? is that advisable? what type of sand do i use and how much.. high or low flow and where to the inlet and out lets sit? does it need to be lit ?