Chalice Help

[Neogenocide]

Hey Guys,

I've got something odd going on here, and I can't put my finger on what it is. My chalices just seem to be peeling their skin. I had trouble with my Hammer closing up a few weeks ago, but that seems to have subsided and this is the only symptom something is wrong in the tank. I'm stumped and was wondering if anyone has any idea on what might be wrong and how to save them. I should also mention that each of these chalices is in a separate tanks, although they all share the same water.

About my system:

It around 300 gallons, pushing 5 years old.
180g DT
125G Sump
2 - 30g frag tanks
dosing is done via pumps run by my reef angel controller

Water Specs:

SG - 1.024
PH - 8.28 - low swing at night time is 7.9 the last few nights.
Nitrite - 0
Nitrate - 0
Alk 9.912
Cal - 381
Mag 1200


I don't think my specs are so far off that it would cause this......so any reasonable thoughts would be appreciated.

Now for the grusome pics:

 

[aromano]

How high is the flow in their area? You can try cutting away the skeleton under what peeled and glue the edges of tissue down with crazy glue. Low flow and low light for a awhile might help heal then slowly bring them back out to where you think they might do well.

 

[usmc121581]

I lost a show piece of bubble gum chalice to something like that, never could put finger on it. It only affected this coral, not my other chalice. What I found odd was it even affected the crag of that coral a month later.

 

[Lamnguyen1313]

Your chalice should be fine, but I suggest you put your lights on low as well as the flow.

 

[glweek]

your mg looks low as well ill get tissue recession if it drops close to 1200

 

[pjwperth]

read the thread titled rescue corals the guys and gals have some great tips and have had had alot of success