I just got two new German blue rams. One male one female plus I have the other two old females. When I first put them in everything was fine but then a few minuets later my old females started bumping and pecking not only the small female but the much bigger male. I took my old ones out when it started getting bad. I have since tried two times to try and add them back in one at a time, and both times they always end up bumping and pecking mostly at my new female. Does anyone know any tricks to stopping them? The new ones are happy and fine at the moment. They do no peck so why are my old ones being so mean?