I recently got two males and two females yesterday and took one male out today due to illness. now one of my larger females wont stop nipping and chasing my other female. ever since I took the other male out she seems to have got an attitude. also she seems to be hanging around the male really often and when the male goes near the other female she gets in the middle and chases the smaller female away, my question is, could she be spawning or something? and also my male keeps niping at her little eggshoot thingy, pardon my lack of knowlege of the fish anatomy. how can I get her to stop harrasing my other female and why is she doing this? pls pls answer quick I am nervous!!