I've never seen Dinos in the sump (unless it was growing in the scrubber, which I took offline after the scrubber manufacturer found out I had 100% dry rock and sand and recommended pulling it and focusing on biodiversity).
I did try moving it to the display, but have no place to mount this beast of a unit (kind wish I got the 57W because it's smaller

). It's way too big (we tried to do that originally, but couldn't find a spot for it unless we drilled holes in the wall to mount it or we open up the top of the tank risking fish jumping (I have wrasses that are jump risks).