Thats a start, but its the rest of your setup that concerns me the most. I cannot see a thermostat in the pic, and do not see anywhere you mentioning that you are controlling BOTH the heat lamp and the heat mat with a thermostat of some sort. If you are not, get one, and get one now, while your at it get a IR thermometer so you can measure the surface temperature on the hot side (over the heat mat) and get that adjusted with the thermostat to about 91 (or at minimum a probed thermometer). Ignore calling the pet store about if they fed in the enclosure or not, judging by what you got the snake in, they are clueless about proper care. Another member mentioned blacking out three sides of the tank, that would also be a good thing, will help the snake feel more comfortable.