One week old 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. NOTE THIS TANK IS NOT PERMANENT I WILL MOVE MY OSCAR TO MY 75 GAL WHEN SHE IS BIGGER. So do not give me comments that say my tank is too small or you will be reported.