dunno.......mine is too. Its figi rock right? Mine was red/pink when I bought it........and the more it sits in my tank the darker it gets. I think it could be aquacultured........I got my from petco. you?
i got a peice from petco once. and yeah it was a brick red sorta color. then i got rock from other places that was purple. now ive got rock that has some of the petco algae on it, and some of the purple coraline algea.