Hello all, I'm a new "reef keeper." I recently inherited a 90 gallon tank from my cousin, complete with healthy fish and coral. I'm a few weeks in and finally starting to feel comfortable with all the chemistry and maintenance. I've noticed a couple of strange things in the tank. I'm wondering if someone can help me determine if they are a problem? First is a translucent white coating on some of my rocks. Second, there are hundreds of tiny star shaped creatures attached to many of my rocks. They almost look like micro aiptasia. Are either of these identifiable and, if so, cause for concern? Thanks in advance for the help. I have a lot to learn . . .