Powder blue tang acting weird in quarantine

[kaifish]

hello all I purchased a powder blue tang last Thursday and placed him in quarantine, the tang was purchased from a wholesaler. I placed the tang in my quarantine 29 gallon, salinity 1.020 temp at 78. The water as pretreated with coppersafe .87 ppm ( plan on slowing raising to 2.0). He eats very little of the selcon soaked mysis and doesn’t go after the nori at all. The continuously swims up and down along the glass and rarely swims across the tank. I do water change every other day 5 gallons to control ammonia. Starting to worry that his lack of eating and his swimming pattern is a bad sign. Is this normal? I’ve quarantined my yellow, purple and hippo tang and none of them acted like this. He has no apparent signs of illness ( white spots or any bumps lumps or skin irritations ). He’s been in the tank for a few days, may he’s just getting used to it. Any ideas

 

[Big G]

You really need to get the fish eating. And you have the luxury of no visible parasites.

Can you describe the QT setup? Is the light off? Some fish benefit from lights off and only using indirect ambient lighting from the room. Some like a few plastic plants floating where it can hide and feel safe - low stress. Are the glass walls of the tank covered with something on the back and ends to again give the fish a safe feeling environment?

 

[kaifish]

I’ve been trying to get him to eat more. I feed him 3 times a day garlic soaked nori, Selcon mysis and ocean nutrition flakes. The only thing I’ve seen home eat was a little mysis. He just paces the glass all day. For the first 2 days no lights were on just indirect light from the window. Back of the glass Is clear backed up against a wall. I put boxes in front of the glass thinking maybe he’s freaked out by everyone walking by. The tank has a few pieces of Marco rock that stay in this quarantine tank to add a few places to hide but no sand or substrate. The filtration is a aqua clear HOB 40 also added a bubbler just for added gas exchange

 

[kaifish]

Update I think he’s on his way out. I couldn’t get him to eat. He’s no longer going up and down along the glass he’s not not swimming much at all. Just sitting in the corner of the tank. Guess we’ll see , he still looks good his color looks good still no signs of ick. Can I use general cure with copper?