Keep the tank warm. Start a culture of micro-worm. Be aware that dwarf chilid might take 4 or 5 trys to get it right. When eggs hatched the parents will move the wrigglers. Try for TDS
below 100. BBS is only good nutrition for a couple of days after hatching (after about a week you can switch from micro-worm to bbs). Keep the water extremely clean if you move the frys to a sep container.