Please, use it all you want. I have had zero luck in my research of this issue. I would like to know what it is and how it eliminate it. It is currently covering all my live rock that is exposed to my lights, though it does not grow on the shaded side of the rock. Thanks for asking and please keep us updated on your efforts.Mind if I borrow this pic to shop around? I’m trying my hand at social media, bothering some marine botanists’ accounts to see if they can help identify.