I been monitoring the Black Shark so far he doesnt bother anything. If he grows to get that big in the 110g im gonna have to find a new home for him especially since the Angels are my mom's favorite fish.
Adding a small angelfish to a tank where there is already a big angelfish ( and u say he's pretty agressive ) I'm afraid it won't work. the newcomer will most probably get killed as he will be viewed as a threat. Another 4 may have a chance since the agression will be spread out.
Thats my main worry. Im hoping he can get big enough to be able to defend itself. I have been thinking of buying a few more angels to build a school in the bigger tank
