Is my candy cane coral dying?

[JayChen]

This candy cane has been in my tank for a month. It was doing fine since day one until today. I came home and noticed the flesh has significantly shrink smaller. It used to open up and had tentacles out at night. My other corals are doing fine in my tank. I place the candy cane on the sand bed since the first day. I am using the PRIME HD. Here is my parameters.
Ammonia 0
Nitrite 0
Nitrate 0
Phosphate 0-0.25
pH 8.0
Calcium 360
KH 10
Salinity 1.026
Temp 78 F

 

[JayChen]

Here are the pictures.

 

[Vinman]

Here are the pictures.

Probably not sometimes inflated sometimes deflated but it looks like you've got quite a bit of flesh down the branches so give it time and maybe less flow

 

[JayChen]

I also do 15% weekly water change. Also the candy cane was growing really well because one of the heads has branched into two.

 

[JayChen]

Probably not sometimes inflated sometimes deflated but it looks like you've got quite a bit of flesh down the branches so give it time and maybe less flow

I can kinda see the white skeleton structure on top, if that is what it is.

 

[Vinman]

I can kinda see the white skeleton structure on top, if that is what it is.

Could be from flow.... also you could try spot feeding with a Turkey baster could wake it up