xenia problem. please help

[fishguy007]

well, today i came home and noted that my xenias are shrivelled. my waving hand ones completly closed up and are turning white. i attached some pictures. they are blury, but its what my cell camera took. can someone help me. what is wrong with them and what would cause it and will they come back to life?

i did a water test. ph amonia nitrite and nitrates and all appeares to be ok.

what would cause this and how can i bring these creatures back to life.

any help and suggestions is appreciated.