Feeding my tangs

Just recently purchased a powder brown tang, my tank has been established for little under a year now. I have been doing some research of feeding these guys.

Some of the suggested foods include romaine lettuce and dried nori, has anyone had any experience with keeping and feeding powder brown tangs. I am also aware that these guys are prone to ick but my levels are all fine so hopefully he will be alright

Thanks in advance guys

Thanks mate

thanks JOJO