1. If you have extra tank you can put her in with heater n bubbler..then take her out and put her in there with water from your main tank
2. If you do not have extra tank, then just use breeding grass and hopefully they will survive, the strong ones may survive..
But def might consider of getting even a small bowl with a bubbler and a heater for frys to stay in till they get big enough not to get eaten or sucked in ( by filter ) in your main tank