It doesn't require live foods.
You can use frozen foods in its place. I wouldn't feed live foods unless I raised them myself, which I do. I feed mine live but not because I have to, but because I enjoy watching them stalk their prey.
I only feed live once a week. The rest of the time they eat flake,pellets and other frozen foods such as brine shrimp,bloodworms and sometimes I'll throw in a earthworm from a bait store. They also like algae wafers.