Zoa disease ?

[mling]

So I return from a 3 week vacation to found my primary reef if pretty good shape, considering that my neighbor who was looking after it does not even have a fish tank.  Causalities were 2 cleaner shrimps, flame scallop and a mandarin.  No signs of them as the clean up crew really did clean up.  Wondering if the lack of skimmer maintenance caused their demise.

 

One weird thing was that while all my corals are fine, one rock which was filled with zoas just become what you see below.   I have moved it to a higher location hoping that light would help.  I also noticed that the polyps seem to have some gluey looking stuff between them.  Is this some kind of dsease ?  If so should I remove this rock ?

 

 

 

[GraffitiSpotCorals]

I don't see anything except some mushrooms, at least from my iPhone. Is it fungus? White sponge? Are the polyps mushy and dying or is it just something between the polyps your seeing? I don't see how lack of skimmer maintenance over a few weeks could hurt much. Maybe you had an amonia spike from the dead stuff. Did you test anything?

 

Was the zoa rock a mariculture or wild? Make sure you don't have any zoa pests in the tank if you haven't already. Thoes things are nasty and easy to pick up. Surprised I haven't seen any threads recently about them...

[mling]

The Zoas are around the mushrooms, all closed up; may be difficult to see on an iPhone..  Looks like spongy stuff.

Water parameters are all ok, NO3 a is high at 10 ppm but this has always been high, in fact it is lowers than usual due to lack of constant over feeding by my daughter and wife.

 

I have many others Zoas and they are all doing fine.

[GraffitiSpotCorals]

Try an iodine dip?