She started out with 3 guppies and gradually "rescued" the remainder. She isn't responsible, actually the only reason I offered to take the fish was because her and her parents had decided to flush them down the toilet. So they will survive withouth a filter? I have the 10 set up however I was scared to switch them because one of the tanks would have no filter. I've watched them very closely and so far the males have no been harassing the females at all. Perhaps because they are already pregnant? I'm not going to worry about saving the babies, I'm already in over my head and I don't want to add anymore yet.