My platy gave birth around 10 baby , 5 days before and i separate it. When can i add this to my main tank? My main tank have 2 male 3 female platy, 2 molly and 2 Guppy.
You can add him/her to the tank once they are larger than the biggest fish's mouth in the main tank. Keep in mind that the fry can still be picked on even then, though.