Urgent Coral Issues: Help!

Hey all, looking for a little assistance with my corals!
Just under 2 weeks ago I added a frag cluster (Stars, Zoos, Mushrooms, and Waving Hands). At first my Green Zoo's never opened, when everything else was great, but now they have started to. Problem is now my other Zoo colony will not open (been 3-4 days) and the large turquoise mushroom beside it is now almost always shriveled up (both day and night). I read about iodine baths but I didn't know if I could one because all of these frags are glued together. I guess it is weird to me because all of the other corals seem to be happy. I have looked for an visible parasites but have not seen anything. Water quality is good, LED Ecoxotic canopy (white, blue, and UV) so they have light!
Please let me know if any of you have suggestions! It is the centerpiece of my tank and I would like it to be happy

 

What are the params? How much flow?

 

Tank params are:

26g
Ammonia-0
Nitrite-0
Nirate-0
Calcium- 440 ppm
Dkh- 9
Flow- Moderate
Lighting- High

The Zoo's are definitely dead. They are turning brown, have become kind of jelly like/transparent, and are starting to float off. I am worried it is something that is spreading???

 

Brown Jelly Disease

http://www.athiel.com/lib/bacterial.html

 

Is it contagious to other corals? It is downstream from the other frag specimens thankfully.

 

sorry to hear mate,
Had similar problem, triple check your salinity and temperature with different eqiupment if possible?

Regards

 

Once they're dead should I take them out or let them decay on their own? My emerald crab and peppermint shrimp like to munch on them.