Here is a pic from my gallery from Dec. `06 of all the zoanthis in my nano.
I always do a fresh water dip on a new zoa colony before it is added to my tank which will kill any nudibranch ( if not the eggs). BTW zoa munching nudibranches will become the color of the zoas they are eating so they can be hard to see..
IN Feb. of 2007 I added a new colony on zoas. All was fine for 2 weeks then I notice the new colony was not opening and polyps were disapearing. I mean they were just wasting away. It rapidly spread to the my other zoas.
I did a lot of research - read the threads that Techno-Vicki just posted a link to above. Long story made short. I lost the new colony, all of the orange colony and all of the teal ones too. I probably lost about half of the polyps of the other 3 colonies but I was able to save them. and they are doing much better and slowly growing again. They still do not look as good as they do in that pic above tho. It was really heartbreaking.
The teal colony started as an original HH on my LR when it was first added to the tank. About two months of the LR being in the tank One little teal polyp suddenly showed up. A feew months later there were 5 polyps and a few months later they really started to grow. There were over 125 polyps in that colony when they caught the wasting disease. I could not pull that rock out of the tank to do a FW dip as it was the main stuctural piece of LR in the tank. It was very painfull (still is) I have not talked about this wasting disease very much but this seemed to be the place to do it to possibly help other zoa keepers.
Look what I found.
These pics are from Feb. `06, April`06, Aug.`06, Sept`06, & Feb. `07