What kind of coral did you pick up?
Have you acclimated it yet?
Generally you want to introduce them to your tank at the bottom. To allow them to adjust to your lighting. Than place them in an appropriate location.
Thanks!
They are the mushroom corals from this site. I have 2 of them and just got through with the acclimation process. I have "released" them into the tank and they are sitting on the bottom now.
Thanks!
Roni