Duncan Coral Stem turning White (HELP!!)

[Aaron C]

Hi guys,

My Duncan coral has been looking like this for a couple days now and I'm concerned I might loose this piece overall

The top few heads look sunken in and there is no fleshy green polyp inside, I'm assuming this means it has unfortunately died, however as you can see the bottom half still looks alive and I'm hoping I can save this piece.

I am currently running an AI Prime 16HD and I have had this piece for 3 months with no issue, no major changes has happened to the tank either recently

Parameters
Alk- 8.2
Mag- 1250
Cal- 400
Sal- 1.025
Nit- 8.2
Phos- very low

 

[SaltySqueeble]

it is probably hungry. You need to bump up the phosphate. I find Duncans to be the first to close up due to phosphate.

 

[kevgib67]

it is probably hungry. You need to bump up the phosphate. I find Duncans to be the first to close up due to phosphate.

^This and your magnesium is low.