Coral eating snails??

[Attreui]

I recently noticed about half a dozen extremely small white snails on a cabbage leather. I dont notice any damage to the coral yet but they are only on the leather. They are very very small about the size of the tip of a sharpened pencil. I cant take a picture of them but they resemble Coralliophila snails in the picture in this article.

http://www.unep-wcmc.org/marine/coraldis/cd/snails.htm

Can anyone comment on this and if it is possible that I have id'ed them correctly how would one get rid of them? I dip and QT all coral coming into the tank so I am not sure where they came from all of a sudden.

Thanks

Steve