Tang help!

[PristineReef]

My tang is looking horrible. My wife just texted me pics. Thoughts? He's been fine for 2 months. Feed daily brine and mysis. Give him sea weed once a week. Parameters r in line. Temp 80.

TIA!!!

 

[Fish Think Pink]

My tang is looking horrible. My wife just texted me pics. Thoughts? He's been fine for 2 months. Feed daily brine and mysis. Give him sea weed once a week. Parameters r in line. Temp 80.

TIA!!!

Have you been using charcoal (HLLE comes to mind)?

Did change *just* happen? What changed? Restest parameters.

Weird seeming question: Do you have young kids?
My sister's young child put something in tank to "punish" bad fish years ago... wiped out that tank's inhabitants.

white light photo as well as specific water parameters would help

EDIT: Herbivore with only weekly algae may impact health; daily clip nori sheet inside tank gives tang browse option and going forward may be more healthy feeding enhancement

EDIT 2: any unusual cleaning or scented candles in room with tang?