I have 4 bolivan rams in a 55 gallon tank, im guessing 2 females, 2 males. The one larger male seems to be agressive towards the others at times, it almost looks like they are kissing but he lunges himself toward them and they start pecking at eachother to me (violently) I cant tell if he is defending his territory or if he is just playing around with them. All my parameters are : 0 ammonia, 0 nitrites, 7.4 ph and nitrates are 5, temp is 78...what should i do?