I just zapped my aptasia so I'm on to another question..... Is this just algae or could it be something wonderful? I was in a fish store last week where they had a rock covered in bright green ??? It was neon and quite beautiful. I gave the lady my name and asked her to phone me if she got more in. She said it was pretty hard to get so I'm not imagining that I could have it but it did look similar to this.... but much thicker. Anyway, if you know what this is please let me know.... also, if you have any idea of what I might have seen in the fish store let me know that, too. Thanks for all the help.... I'm full of questions tonight