I have a very healthy sun coral and was gone for 3 days and noticed a little tissue recession in two different spots upon return. I fed him every day for three straight days (usually every other day) and it's starting to look better (that was a week ago). There is no way I would wait an entire week. I have a feeling you would return and most of the polyps would be intack but the tissue in between may be severely damaged. IMO I wouldn't try it. They (at least mine) seem to be very sensitive. GL