Is cabbage coral shedding or dying??

Hello I purchased a cabbage coral and in the store it looked great.. Big of course when I got it home it was looking ok but a week later I seen one forming brown stuff over it and she's it but another one has it but it is not coming off.. The store had it on the too of the tank I put it on the bottom and it looked good but I moved it to the too like the store and now I'm here.. What do you think is going on??

 

Post image please.

Also significantly increase flow to it and see if the corals is rotting or whether it needs higher flow to prevent algae growth and promote removal of the wax coating.