I have an angelfish that is about 1.25 inches. It's now big enough to the point where I don't have to fear it being eaten by my other angelfish that is about 4-5 inches. How should I introduce the younger angelfish? I tried to put him in my 36-gallon with other fish his size and one angelfish but the angelfish started chasing him around so I had to take him out. I know it's normal for angelfish to chase newer angelfish around but I'm afraid that the smaller angelfish can get seriously hurt since he's at a disadvantage.