HELP!!! Naso Tang just won't eat, getting worried

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I have a Blonde Naso which ate fine at the LFS but wouldn't eat when I got him home. I feed Nori, pellets, frozen mysis as well as the frozen homemade mix and he would show interest when I fed but not actually eat anything. It took a week or two but he started eating and hasn't stopped since. I know I'm not offering a solution but time may be all she needs to get settled in before she is comfortable enough to eat.