I cut pvc pipes (4) drilled holes thru it so it looks like cheese. then with holes drilled around top i zip tied a piece of egg crate as the flat surface used to use glue but neve held. i had to raise my last two skimmers from 4 inches to almost 6 inches now works great.
I used a piece of glass and glued the pvc legs to it using aquarium silicone. I also glued it to my sump. I did this before filling it though. The holes in the PVC legs are a great idea for an added shelf.