I've been fragging that stuff for years. Had elongata once and it would easily peel (all of it) from rock or glass when I pulled it. That was my old 75g tank that I believe had a serious xenia crash. Killed all my inverts and coral. I belive I didn't frag it fast enuf and it choked on it's own mucus from being so think.
In my new tank, I've now got pom pom. It doesn't peel like the other did, but I will either scrape it from the glass or overflow to get clean pieces. I can still pinch those thicker pieces and pull it. I use the toothpick, rubber band and rock. Two days later remove the rubber band and toothpick (twisting motion) and it takes to the new rock.
Only get $8 each from the lfs
, but I get the rock rubble free. I only do about 5 pieces a week since it does secrete mucus when I rip it and I don't run carbon to filter when I'm done.