Hum, I forget about No sand in the QT. He won't be comfortable as no substrate to filter.
Mine takes flakes, brine and Mysis.....hiding spot.....maybe consider to shorten the stay if he doing real well, active, eating.....maybe just a week.....had to do this for a mandarin as no pods in the QT.....so I bought some pods, just gave him 7 days and in he went.
Yes I know, a risk, but I was sure he would not last 30 days without food (in this case)
Hopefully others will chime in, otherwise judgement call on this one.