Nylon like weed, PLEASE HELP

[Walt Ballantyne]

I have had some of this in my tank over the years but now it is out of control. Everytime I try to manually remove it, it breaks off and spreads and is now ruining my reef. What is is and how do I get rid of it, without replacing all of my Live Rock? I don't think this is Algea, but an actual plant.

Thanks in advance!

 

[KJ]

https://www.reef2reef.com/threads/a...atic-algae-and-the-means-to-control-it.87351/