calm down.
Why not keep him with your other black skirts? Mine have been fine with much smaller ones, although they are in a 55 with plenty of hides. I haven't seen any serious nipping out of them.
He is in a QT tank for the next week or so, maybe more. 10gal tank, whisper 20 filter, lamp for light, java moss, algae, sand substrate, fully cycled, heater, airstone, the works.
As for the "calm down", I would really like to not have any form of insult or aggression in my threads, and I am trying to remove such things from my personality as well.