when placing frags into a tank are you suppose to just glue the disk the frag is on onto your live rock or is there a way to remove the frag from the disk and glue the frag directly on to the live rock ? For example I have some frog spawn frags that are on discs do I just wedge the bottom of the disk into a crevice in the live rock, or do I use putty and glue it in place or do I remove the disk and glue the frag itself onto the live rock