Ok so I have a black marble in my tank. Thursday I rescued a silver domestic and the body of this fish is the size of the palm of my hand, it's huge. Those 2 angels get along great. Well yesterday I was able to get a pair of very large koi angels for my tank as well that have been together since birth. But their not a breeding pair. Well ever since adding the koi angels the big silver domestic has chased them and pestered them everywhere. Now will this stop once they establish a pecking order or am I gonna have to rehome someone? My tank is a 55 gallon.