so i have a platy who has just had a pregnancy---she is done i think- not sure. but anyways-- the male platy is chasing and nipping at her like crazy-- what should i do? just let them go at it? he is chasing her around the whole tank and she just seems bothered--i fed them and he stopped to eat a little bit-- then he went right back at her -- if anyone wants pictures i can put them up- -but yeah-- what should i do?