hammer coral

the smaller head on my hammer coral looks really weak and is not improving no matter what I do. I have tried increasing calcium doses and water changes. Any help help to get it better would be much appreciated.

I bought and orange hammer coral yesterday and placed it in the tank where it can get moderate flow and moderate light, basically mid level in the tank on a piece of live rock. I came down this morning and it had fallen. What is the best way to secure coral so that it does not fall from its...