I have a melanurus but he doesn't seem to do anything with them. The tube ones are easy to break off, but the spiral ones are nearly impossible to get to. I got some super glue gel and dabbed some on the end of a plastic chop stick and it was relatively easy. Got most of them covered. Going to try and get the rest done tonight. The webs were really irritating my corals.
Now if I could just catch that stupid polycad flatworm, I would be good to go!
BTW, I also glued down the aptaisia as well. I will check when I get home to see if it worked. basically did the same thing people do when they use kalk paste.