Skinny Blue Throat Trigger

[Coralgurl]

My blue throat trigger died yesterday. I thought he had made a turn for the better, out swimming, eating, but 2 days ago, he stopped coming out to eat. My daughter found him floating around the tank yesterday morning.

All other fish are doing well, but I still can't get rid of the worms. I've treated 4 times now with Prazipro, yellow tang still seems full of them. Not sure what to do.