PLEASE HELP!! My zoas are dying !!

[kg4izw]

I have never has problems with zoas in my tank before the other day. I made a new frag and placed it in an empty area of the tank. It was fine for a month, but then one morning half of it has disappeared. The next day, the rest of it was gone. All that is left is a lumpy surface that the zoas used to be growing on. I was sad but not too upset as I have more of them. But yesterday one of my beautiful button polyps was gone. AND then today the other one is gone along wiht a large portion of some different zoas that are on the oopposite side of the tank.
I have no clue what to do or how to find out what is happening to them. I took some pics, but my camera is my cell phone.
Please help.

 

[Kewlworm]

Have you check for parasites?

 

[Pufferpunk]

This is the reason I started treating my zoas with vitamin C--they would start melting for no reason.

 

[kg4izw]

Yes, there are no parasites.
This morning there is more of the same. More dead polyps.

 

[kiran523]

It sounds like an infection. I would do a Lugol dip or a Furan-2 dip asap.

 

[Auntbeez]

Sounds like something is eating them.

I have had some melt away, and usually it meant my water pram. was out of whack, but you made it sound like one day they are there the next they are gone. To me that sounds like someone is having lunch.