could anyone tell me how long it takes for them to have the fry they are about 3 weeks now i think and all the little black dots in there bellys have disappeared but can still see something inside. got a little breeding net basket and was going to let them have there young in the big tank then net all the fry out and then i'll put them into the basket net. i have 4 females and 2 males in the tank with 2 corys