I have had my 10 gallon tank for 4 months. I have 3 male guppies, one female molly...The molly apparently gave birth to one baby, which I have in a floating clear "crib" I bought from store. It has been about 5 weeks since I discovered the baby and put in the floating container. It is about 7/8" long, including the tail. The mother molly is about 2- 1/4 ", including the tail. I am not sure if she would try to eat the baby...so HOW BIG DOES HE NEED TO BE BEFORE LETTING THE BABY OUT?