Re-purposing a cpr hob refugium

[dcw1sfu]

Just curious why would you not use it as its intended and just hang it off the side of the sump rather then the side of the display tank? I thought about getting one as well and I also don't want clutter hanging off the side of my tank I was going to have it hang off the side of my sump having it pump from the baffle prior to my return and then drain into my return chamber.