ID needed please. Good guys or bad?

[N2SWIMN]

I started seeing a few white stringy things in my tank. What are they and are they good or bad? Please see pictures.

 

[joseserrano]

Hard to see, but maybe sponges

 

[mattyzang]

yeah less blue light would be ideal, but to me they look like those feather dusters

do they look like that?

 

[kadyooo]

Vermetidae snail?

 

[drexel]

Turn blues down all the way and whites up and take another pic.

 

[N2SWIMN]

Ok, will take a picture later today with the white light on.

 

[N2SWIMN]

Here’s a picture under white lights.

 

[mattyzang]

looks like sponge, spaghetti sponge i think? not a sponge expert