Interesting,I purchased a zul almost a month ago today andit has been nothing but trouble since day one.First when I got it home it looked as though it hadn't eaten in quite a while and when I removed it from the first tank I'd put it in and placed it in another,more safer tank,it seemed to stiffen up and looked like it was going to die untill I placed a powerhead to create more oxygen...Then a few weeks ago this fish had a prolapse but that went back in,then an eye clouded up but I was able to clear it...I had read your previous thread regarding your zul troubles and I got some prazi and treated it for about a week,hoping that it had a bad case of parasites.....The zul still hardly eats,only a small feeder every few days and it's body has not filled out......I bought this fish from a member who claimed to have gotten it from a friend so I don't know where it originally came from or who brought it into the country.I am thinking about trying a copper based medication at this point as Isuspect it still has some resistant parasites in it's gill/mouth area.......Sorry about your troubles and loss.