When can fry go into the main tank?

on Aug. 15 i found 1 baby fish! im pretty sure it came from my molly, i have 1 molly 3 glowlight tetras 1 red eyed tetra and a blue mystery snail. the baby, "Nemo" is just starting to get color, he is orange ish like my molly but when can he go into my main tank right now he is in a breeding net.??