I use a large cardboard box with astroturf on the bottom just like his tank. He won't eat unless the turf is down! But I won't feed him in his tank. It's just best, IMO, that he never associates food with his home. Sometimes a wandering finger can be mistaken for a meal-sized item if they are used to finding food in there once in a while.
Just an extra precaution I take to avoid unpleasant possibilities. :wink: