What is this? Long stringy hair like stuff?

[Shawnman]

Looking for some feedback what this might be? I assume some type of algae? What is it and is it harmful? Seeing alot of it at the bottom of my rock and sand, pretty much just on the one side of my tank.

 

[CK00020]

Looks like a spaghetti worm

 

[Shawnman]

Looks like a spaghetti worm

That's what I was wondering if it wasn't some type of worm. Ugh now what?

 

[Rp8]

Good clean up crew. Just don’t over feed or the population can explode