ive been told platies eat their fry but my panda platy didnt seem 2 mind them .should i keep them with her? just in case i put the fry in a diferent tank
If their well feed it's not a problem, but if you keep the fry away for the fist 10 days then their be ok to go back, However other fish may love to eat your baby platies so just watch them.
In my just guppy tanks i leave the fry with the adults and all is good.
To differentiate males from females you use the presence or absence of gonopodiums. Please see my post for sex determination that you can reach from a link in my signature area. I called it "sexing livebearers".