Hi, so i have had my bp for a few months now I just upgraded from about a 10 gallon tank to 40 which came with a heat pad and I put in a 40 watt bulb but lately all he does is stay under the cool side rock and after he fed he slept in the warm side for a few hours near the corner. Is it possible that the light and heating pad are too much? Should I move the light to the cool side?