Presoak your pellets of choice in the juice of frozen bloodworms. Only feed in AM when the fish is most hungry, and do not offer any other food. Leave the room after you feed, your FH may just be nervous in their new environment. After a week or so (or less) of this your fish will slowly but surely start nibbling on the food. Once it is eating like gangbusters slowly wean off of the presoaked food, over several days, and convert to 100% pellet. I have trained juvenile FH imported from Asia that were raised exclusively on bloodworms, and had 100% success rate. Good luck.