So after years in the hobby I finally got an Angelfish and...I really really like it.  He (?) is a marble and was tiny when I got him (dime size). Now he is the size of a quarter and growing fast.  He is in a fully planted 29 gal with some black neons and diamond tetras.  The black neons are old so I don't think they'll last much longer.  Should I get him a buddy?  My concern is fighting/fin nipping.  He has perfect fins.