Hello I recently bought a new tank and it came with several fish. One of which Im somewhat concerned about. Its a red tail black shark, would he be able to stay in the tank with my BKG I like the shark alot he is really cool looking. I talked to some people about it and said no because they are agressive but there always talking about the albino red tails. The black one I have it super nice and dosent pick on anyone and isnt territorial.