Candy cane heads dying

[Saumann7]

I’ve had this candy cane for over a year, it started as 3 heads and now has wel over a dozen. I looked today and 2 heads had no tissue and it was starting on a third. What can I do to fix this before I lose the colony

 

[WickedCZ4A]

1. Frag the dead / dying off to keep it from spreading to the other heads.
2. Dip the coral to check for any pests
3. Check your water parameters