HI every body I am new to the forum so bear with me! I have a 45 gallon bow front up an running for a month and ahalf I have about 23 fish init and one mexican crayfish. I added 2 angels last week got a long great and I added one this week. smaller than the others thought it would be no probem. The big one keeps chasing and hitting the small one. I don't know sexes hoping you could help me with that maybe that is the problem. Before I remove the larger one because I like the small one a lot maybe someone coould shed some light on the situation or what I did wrong. I have pics the llarger one with the high forhead is the picker and the small grey and black is the pickie.