Help id this nuisance....thanks

[miserkris]

Do I have vermatid snails, they r taking over my dt, growing over montis too.

These are small stony black tubular things that are coming everywhere.

Here is pic, pls lmk what it is! Thx....http://img.tapatalk.com/60e3f267-34cc-40e4.jpg
Black /brown thing on right on mag float.

[seapug]

Looks like vermatids to me. They will come in mass after spawning events, but rarely cause real problems (for me, at least). They can usually be broken off pretty easily with tweezers.