Can any ID this for me?

[MikeG2104]

Found these on growing on my live rock and now some on the glass. ( I'm talking about the while spots). Any idea what it is? Tank has been cycled for about 4 months now.

 

[Lovemyreef2015]

spirorbid worms. Harmless filter feeders

 

[MikeG2104]

spirorbid worms. Harmless filter feeders

So i should just let them go? Are they a sign of a good tank or that something is off? Thank you

 

[Lovemyreef2015]

So i should just let them go? Are they a sign of a good tank or that something is off? Thank you

Yes I would just leave them. I always see them start to show up as tanks mature. So it's a good sign. You're welcome