ive had this fish in my tank well over 3 years and i noticed today he is starting to act funny.it wouldnt eat yesterday and today it is staying by mypowerhead swimming in frantic cicles around it..could this be the end for him.i know they dont live along time in captivity but it seemed so healthy 2 days ago.i know i will get posts on how sensitive these fish are i just want some opinions on whether you think its over or how can i help it