Help ID this clear stringy stuff?

[John_Sav]

Currently I'm in week 3 of cycling my new 15 gallon Im fusion tank. These clear stringy hairs are starting to pop up all over
the tank. I started with live rock from my LFS and live sand. I've tried looking up anything similar, but everything I find doesn't quite match. Any ideas as to what this stuff is?

 

[Stang67]

Looks like filaments from vermited worms? Pic in white light would possibly help.