[Nano]

it'd be good to see a pic for sure.
but IME (and my experience is fairly limited)
My zoas do best on the sand bed or low on the rocks, I have tried some in higher flow areas and they seemed to melt overnight, I managed to save them though. Can you visually see anything on them? I would pull the frag for a look?
Also I wouldn't right pods off, especially amphipods, I am on nano reef as well, and a couple people as of late have found amphipods to be the culprits of agitated zoas so placing them in slightly high flow has help, also dipping. but IMO that may only be a temporary fix for amphipods as I am sure they would come back eventually.