i have learned that if you put a pregnant fish in a breeding net, that it usually stresses out the fish. i have tried to use the breeding net twice and have been unsuccessful both times. when i let them out, within about 5-10 minutes there were fry in my tank. i then scooped them out and put them in the breeding net, i currently have 17 mollie fry. the fry when they are born will look for a place to hide, in the gravel or plants.