Mine will be 9yrs with me in Nov. I fed him every 3rd day first year, then every 4th day, for the past year every 5th day. He gets large 2 table shrimp with shell on, cut in half ( remove sharp tip in shrimp tail) and every 6 month I add 4-5 large emerald crabs to tank, sometimes they're gone in week, sometimes they go untouched for months...