The wirey stuff sucks, I put a piece of dry rock to separate a torch & Duncan and it grows out of the new piece of rock like crazy & no amount of peroxide & scrubbing gets rid of it, it always grows back. I eventually took out the rock.
Acid bath all the dry rock if I'm ever oing to use it I guess.
I was also going to mention hermits & a Mithrax/Emerald crab, my old emerald tore chomped the stuff down.