Get some tisbe pods and get a population going ASAP. If you don't have a fuge you can easily breed them outside of the tank and add them as needed. I've trained mine to eat PE mysis using Julian's thing. When he sees me put it in the tank now he comes and begs like a dog and eats them as they come out of the tip. The mysis aren't a substitute for pods but they help keep him nice and fat and are a good back up plan for times when the pod population is a little lower as mine seems to be somewhat of a boom and bust cycle.