since you have already introduced this one, you could have problems regarding aggression. if you are able to find an angel that is the same size or even a little bigger, it could work.Yea. Gotta start working on a tank specifically for him/her and the other one almost identical. Got both yesterday from a breeder in East Stroudsburg PA.
Got a 37g to set up for them. Think that will be enough for 2?