Little white things

[reefsquad3]

hello everyone I was just curious if anyone could tell me what these little white things are all over the glass in my tank they are now everywhere and I can’t figure out what they are thanks in advance

 

[KJ]

Spirorbid worms filter feeder.

 

[reefsquad3]

Spirorbid worms filter feeder.

Thank you [emoji1317] are they anything to worry about?

 

[KJ]

Thank you [emoji1317] are they anything to worry about?

YW No harmless filter feeder.

 

[SashimiTurtle]

They are all over the back chamber in my AIO nano. I suspect they will start covering the inside of the overflow on my cube shortly, they were in there when I bought it... but dead and rotting so I took a razor to all of them.