I feed mine 1-2 times a week. Sometimes it doesn't act all that hungry and doesn't open up so I just wait until the next time. I feed my tank every other day, sometimes every third day if I fed it heavily the time before. Good luck! I think they are very beautiful. They like to be in a low light area, too. They hang in caves, in the dark in the ocean. Some people seem to have no problem though keeping them on the sand in the light. It took mine like 2 weeks after I got it before it opened up, too, so don't worry if it takes a while.