Hi snotirl,
The fish you listed in your last post would devour all of your fry instantly, especially if they're the same size they were when born. A breeding trap or net is not designed for raising fry, only for birthing them. They do not have any room to swim or grow, and although there are holes in the trap to allow water circulation, the water quality inside the trap deteriorates much more quickly than that which surrounds it. Even a 1 gallon plastic critter keeper is sufficient as a fry tank, provided it is kept warm, you filter it with a small sponge filter, and you do frequent water changes. You can even float the 1 gallon plastic tank in one of your large tanks to keep it the right temp; just make sure it's not hovering directly under lights which will heat the water too much.