armatus

I bought my armatus 2 days ago. I notice it's not swimming around and eating. I given mp,live feeder,blood worm and it's not eating!! Currently in a 2ft tank with pacu, I had tried separate them and left the armatus alone. Please help !!! Advise needed thanks in advance !

I've noticed my 6inch Armatus's fang is broken and bent inwards. Is this a normal thing that happens or should I be worried?

So I finally bought my dream fish for my 100gal. A armatus payara, its about 3inches and its looks amazing. Just wondering if anyone has any care tips or "do's and don'ts". I did as much research as I can but I'm sure I can get better info from someone who owns or owned one.