Hi guys i already have a single large 5 inches length angel fish in my 75 gal tank with 2 small polypterus. Today i bought 2 small/medium angel fish about 3 inches length. The large one began to bully the smaller ones. he chased and nipped the smaller guy's tails. will that stop or will it keep going?? I've heard that angel fish are only good in groups. is 3 angels good enough?? I think the larger one is an altum angel and the smaller ones are just normals. So far I have my angels divided up. what should I do. Is this a territorial problem is is this temporal?? my large angel never did anything like this to my polypterus. My 2 smaller ones cohab perfectly.