needing some SPS help

[ashr]

Hey hey


So I'm looking for some feed back on some SPS issues I've had in the past month or two with one of on my large SPS colonies.

I noticed this after my doser has stopped working and my Alk dropped.
As the picture shows the coral should be a deep green but I have had a lot of the large parts turn to a light blue and looks to be dying. If i was to pinch the tips of these parts they would disintegrate between my fingers.

Any thoughts would be welcome!

As of the other day ( i didnt have my doser running for a week due to lack of chemicals)

Alk 5
Calc 450
Mag 1400
Salt 1.027/28
temp anywhere from 76f-80f

[IMG][/IMG]


As of now I have clipped most of these parts off in hopes they will start to grow new and become healthy again. Also I don't have any issues with another coral as far as I can tell.