Favia not doing well. I think?

[Medmondsii]

Hello all I recent put a favia in my tank on the sand bed. And it's seems to be kind of sunk in. In qt tank the sweepers would come out at night. But now I hardly ever see them. I haven't feed for this reason also.
Is there something I can do to help it look better?

I'm hoping these pictures can help out.
Thanks

 

[KrisReef]

Maybe it was hungry in the qt so it was sweeping for food? It looks ok now, imo. I bet there is more nutrients available, and perhaps more light?

 

[GHOSTLY]

White lights would help