icky grayish algae

[Fishwife]

Hi everybody - I haven't written on this forum for quite a while but I have a question. My 200 gal. has had a few "disasters" hit in recent months. We have lost or given away quite a few corals due to intense chemical warfare and are now down to simply softies. Our fish are doing fine but the tank itself looks lousy. In addition to cyano and bryopsis, we have an icky grayish algae(?) on a lot of the rocks. It is short and collects detritus like crazy. Does anybody know what this mess is and if there is any way to get rid of it? We are just trying to deal with the other problems and let our tank stabilize again but it is really hard to do with this other stuff growing all over the place.

Thanks - Laurie