Pacman Feeding questions

[Janus]

Hey everybody my girlfriend just got me a little pacman frog. Its about 2 inches long. The pet store guy said that they can just stay in a little bit of water. They kept it a cup with a half inch of water. I plan to get some kind of substrate later today. I have the little guy in a five gallon tank right now. They also told us that they only need to be fed once a week and to feed it pinkies. The day that she got it they just fed it one. I've gone back through the boards and looked. I know you're suppose to feed it a bunch of different things, but it seems like everyone has a different idea of what to feed it. What are you suppose to feed it? How often are you suppose to feed it?