hey man, heres my little input for your non eating retic here. Try and find some live blood worms like someone already stated, if you cant find those try getting some ghost shrimp, yes a little pricey but it'll save your ray. I bet the store you bought it from just got those shipped in and they weren't eating anything in stores, they just told u a bunch of garbage. If you wanna go one step father to make it eat if it hasn't so already, get another retic of the same size. This creates a competition for food and usually, with my experience at least, gets the picky retics to start eating. and like everyone else is say, lights off and water changes.