Ummmmmm...someone had to be the first to say it, so I guess it might as well be me. In looking at your profile, it says that you have a 29 gallon tank...and in your pictures, I see a yellow tang.......that tank is going to be WAY too small for a tang (of any kind). The tang police will soon be knocking on your post (hopefully, you just haven't updated your profile and have upgraded your tank size).
Picture of the Tang Police! https://forums.saltwaterfish.com/t/280056/putting-my-tang-to-work