clove polyp

[debbie]

A friend has what I think is a clove polyp all over their tank. It is attached to the back and side glass, rock etc. Sort of a purple/brown color. Does this sound right??
What I would like to know is if they scrape this stuff off the glass it comes right back, any way to get rid of this??

 

[nycbob]

its hard to get rid of it. cloves r similar to xenia. i hv both, so i know what a pain it can be when it spreads everywhere.