Baby guppies???.....?

I have five one week old guppies and i was wondering what I have to do. I have them in a breeder box in a 20 gal tank Nd they will be food for the Oscar in there I have 10 fish ( not including the guppies ) 6 minnows 2 adult guppies 1 pleco that is temporary and a two inch Oscar.i will be moving my oscar into the 75 later and i will be reselling my pleco later.