Anyone know what this purple ish red stuff is covering one of my live rocks? At first i thought it was some kinda sponge that came when i bought it (fully live rock from Florida), but it’s really started spreading in the last 6 mo and is starting to eat away at one of my corals now. Tried scraping it off, and some of the color seems to go away when i do that, but it doesn’t come off easy and always comes back.