So I have noticed little areas of this algae popping up. It seems like none of my CUC of various snails, hermits, or algae eating fish (Tang, Hectors goby, Blenny, etc) will touch it. It's kinda hard to pull off the substrate it grows on and is starting to spread so I want to get in front of it, but without knowing what it is it's tough to educate myself. Any help is appreciated. Thanks.

