lineatus wrasse help

[aussiecoral]

i bought a lineatus wrasse, he was fine when i bought him, no sign of ich. I follow the step, I accimilate him almost an hour and put the wrasse in the tank without turning off the light, everything was fine. But the next day, i noticed there are thousand of ich on his body so i got worry, i quickly treat him with garlic. The day after ich was gone but i noticed the wrasse skin scales start to peal off but still eating. He was eating fine for couple day but i noticed the wrasse skin scale was worst and all of the sudden it layed down and gasping and die. I don't know what the cause, could anybody give me some advice, thanks in advance.