My LFS store uses pvc sheeting in the coral tank. They have it drilled with 1/2" holes for the frag plugs to sit in. So much easier to keep clean over egg crate.
Good to know I just wanted to make sure the name wasn't deceptive in some way like it was a different material than PVC pipe. I think I will able to make good use of a 4/8 sheet I bought a few months ago.