Black gunk

well when i first purchased my live rock they were healthy but now they are covered in this black or dark green gunk. anyone ever seen this before?

 

I pic would help.

 

I have feeling its cyano but without a pic, no one will be able to id it properly

 

pictures, pictures, pictures..

 

can't take a picture, it is that dark. it doesn't matter the plants are practically dead. and boy does it stink. i also can't see anything alive in there so i think i am just going to trash it.

 

i've got this, doesnt sound as bad as yours though, unlucky mate :|

 

well its done. good thing i didn't have any animals in there. only thing i found was an amiphipod.