acclimate them slowly to allow them to adjust to your tank parameters before you put them in. you can try to feed a small amount of food when they are in the tank. don't be discouraged if they don't eat right away though. some take a couple of days before eating due to stress. if they don't eat in a day or two you might need to get some live blackworms or live brine shrimp to get them to eat. don't use this as a regular food though because there is no nutritional value for them.