If you want them to have a great chance at surviving, take them out and put them in a different tank filled with the same water that they came from. If you don't have another tank, you can go to Wal Mart and buy a breeding net. (THIS IS BETTER THEN PUTTING THEM IN A NEW TANK!!!!!) The net costs $5. Put all the little ones that you can catch into the net and keep them in there. They will be safe from their parents eating them. Make sure the fry are the onlyones in the net though!! After you have done this, take 2 teaspoons of fish flakes and put them in a ziplock baggie. Use your fingers to grind up the flakes untill they become a fine powder, (This could take 10-15 minutes.) Every day feed your fry this powder. Its very hard to get a very little amount of powder to your fry useing your fingures. So take a toothpick. Dip the very tip of it in the water. Take it out and slide your fingure down the toothpick to all the excess water is out. The tip should be moist. Put the moist tip into the powder food and pull out. Put the toothpick in the net where the fry are in. The powder hsould come right off inot the net and the fry will eat. Feed them 3-4 times a day for best growth in your fry. Good Luck!
Ron