Cliff,
I had those before, very nice fish but hard to make it to eat hand feed food. anyway if it not train to eat frozen food then you can go to the fish store buy some silver fish it likes minos. poke the small fish on a feeding stick and wig at the lion fish pretent it alive, hopefuly it will eat. I train my that way, They will eat when they hunry. only feed them every other day or couples day. Good luck! update us.