Some Zoas folding like umbrellas

[splix]

A few frags of zoas I've had in my tank for around 6 months now have been folding back like umbrellas. I dont think they're stretching because one of the main frags doing it is in a lot higher light.
Any spot on reason they typically do this?
Lights are 2x hydra 26HD's with blues at 60% and whites at 10%. PAR reads around 75 with 80% PUR in the main zoa garden on the bottom. The one frag doing it really bad is higher around 150-175 PAR.

150 par frag doing it the worst

showing how 1 frag looks perfectly fine and the one above it is horrible

UC's on the sand bed doing it in the rear. 50-70 PAR on the UC's.

gobstoppers on the right sort of doing it, but nothing around them is. These are on a flat rock on the sand bed.

 

[Vahanyos]

If you look at them very closely, is there any brown goo, color change, anything? I’ve had zoas do that as well, established ones around 5 months or so, and most of the polyps vanished away :/ - after a couple months they started coming back, growing healthy again ...

 

[splix]

If you look at them very closely, is there any brown goo, color change, anything? I’ve had zoas do that as well, established ones around 5 months or so, and most of the polyps vanished away :/ - after a couple months they started coming back, growing healthy again ...

Not really any brown goo. I noticed the bambams went darker when I got them but are slowly coming back orange. They've all been slowly growing when the hermits quit crawling all over them and closing them up haha.

 

[A Toadstool Leather]

Zoas tend to do this when they are not getting enough light. Some zoas like more light than others its seems.

 

[Jeeper]

Do you have a fish that's picking on them? I just removed a filefish that was picking on acans and green bay packer zoas. They looked like that from being pestered.

 

[Vahanyos]

You can see a darker more noticeable goo like film or coating on mine when they went bad so that’s good for you... let’s hope they bounce back. Perhaps move them lower and see if that will help?

 

[splix]

Do you have a fish that's picking on them? I just removed a filefish that was picking on acans and green bay packer zoas. They looked like that from being pestered.

Not that I know of. All of my fish are known to be very reef safe.

 

[ItouchedThebutt]

Ive had zoas do it in my tank usually when i first add them ill see them do that occasionally but have no idea what causes it. Could be not acclimated to my lights or other reasons but ive never had a fatality come out of it and they usually are fine in the next day or so. Are the ones doing that the pandora pallys?