At first I thought my platy had white spot, but now her tail is rotting away and she has white fuzz all over her body, mouth and eyes. She is less active and I think she is dying. I have used the blue dye, stress coat, and stuff antibiotic medicine. She won't eat any of her anti fungal food or her regular food. She is in a separate tank now in brackish water. Should I euthanize her?