Red and white on my feather duster

[catmorrison]

There's red and white stuff on my feather duster, will this hurt him? I'm attaching a pic. Any help at all is appreciated. Thank you

 

[blaxsun]

You mean the sand?

 

[Borat]

The sand often attacks my corals too!

 

[SlugSnorter]

feather dusters have... red and white "feathers" they "dust" the water with

 

[catmorrison]

You mean the sand?

No, it looks like cotton