yeah ive had some zoas that just melted away fro no reason and some that did great..and they all came from the original same tank...in my experience the less u do to them the better chance they have of making it through it...i had some ked reds that i kept repositioning..they were closed for months and kept losing mat coverage..they went from a 30 head colony to all dead
at the same time i had a 5 head colony of tubb blues..same thing..all heads closed but i left them alone...just this past week they all reopened and seem to be growing..so who knows
some make it some dont