Thanks for the replies but it's to late. I removed the rock Saturday and brushed it in a container of saltwater from my tank. The bubble algae was just about covering the whole rock and was spreading. I used a nylon brush and was gentle as possible because there's some polyps growing on it.
After brushing and pulling, I rinsed the rock with clean saltwater from the tank. It looks like I got most of it and some of the polyps have started to open again. Do you think they'll make it?
I've been trying to get Emerald crabs but because of the hurricanes the LFS haven't been receiving orders yet.
I'm going to check again this week.
Thanks