What are these white things?

[aidancoby13]

 

[sixty_reefer]

Feathers duster tubes

 

[aidancoby13]

Feathers duster tubes

I have a bunch of the tubes but no Feather dusters in my tank

 

[aidancoby13]

Feathers duster tubes

also is there a way to get rid of them?

 

[sixty_reefer]

also is there a way to get rid of them?

Only by scraping, they could of come with the rock or they died for some reason