I've got this stuff growing on one of my LR not all over and am not really sure what it is. I am not sure if its apstasia because I have 2 or 3 peppermint shrimp in my tank. It looks like apstasia, the color and shape, but I would think the shrimp would have taken care of it by now. I don't have a camera so I can't post it. How may types of apstasia are there? What else out there looks like apstasia?