depends, traps are ok for guppies or platies, if the devider is removed (no way would 2 females fit in) and it saves the fry, like helterskelter said, too many fry might cause problems. usally if using a trap, remove the female then all deviders and let the fry have the whole trap to them selves. with a net, gives the mother more room, but the frys life in their with her. provide fake plants for the fry to hide, and remove ther females ASAP and most should survive. or a better idea i think, let the mother have her fry in the tank, providing lots of hide aways and some fry will survive.you can always catch some and transfer then to the net or trap later.