digitate hydroids?

[JenniferL]

I have noticed that my sun polyps have been looking a little sick lately so I moved them to a different spot in my tank, and when looking in my tank tonight I noticed I have digitate hydroids on my LR where the polyps were sitting. I googled them and am 95% sure that is what they are. Anyone know what I need to do to remove these guys. They look like a 1-2 inch long piece of thread/feather looking thing that is coming out of small holes in the LR only at night.