need a little advise

[edandsandy]

Not sure what is going on my biggest colony in the tank, do you?

I know this is not the best picture, I took it with my iPhone.
Look at the base of the colony it is almost completely gone, and see the white cotton looking polyps?

Is this polyp bail out?

 

[reefsic]

Its hard to tell from the pic, but I would definetely check for AEFW or Red Bugs.

Have you added any new corals to your tank lately, and do you dip before adding it to your Main Display?

 

[edandsandy]

If you look at the left side of the colony almost at the base you will see the cotton like polyps I am concerned about.

I haven't added any new coral in quite so time... We are seeing a few of the Asterina starfish in our tank.

 

[dots]

How is the light and flow in that area? Any parameter shifts...SG or alk can do this easily.

How is is progressing? Daily, Weekly? Change anything? Better pictures would help.

 

[edandsandy]

This is the best I could do with pictures, It is diffucult to get a good picture because of the angle.. Hope these help.

 

[jcal]

are you dosing anything?

 

[edandsandy]

How is the light and flow in that area? Any parameter shifts...SG or alk can do this easily.

How is is progressing? Daily, Weekly? Change anything? Better pictures would help.

No we haven't changed anything in a long time.
the progressin is slow, if you looks at the base of the coral you will see how much is dying back.

 

[dots]

Looks a little faded if I see correctly.

I know you don't have the best means.....but pictures of your other pieces and the tank in general, as well as the standard parameter and husbandry practices are next.

I would go with an STN from SG or Alk, if no reef herpies are seen.....flow and shading are another consideration.

Not much to go on unfortunatly.