i have removed her from the tank. she went after the other one, too. so i think i have 3 females and she is a bully. i will try again tomorrow. the female on the bottom was very unhappy. i don't want the stress of her having to deal with that all night. if it keeps happening i will get a pic, but i am pretty sure it is fighting behavior. . i was hoping all 3 could live happily ever after..