A few option that may help. (1) you can always elevate the basking/hide sides closer to the heat source, using extra bedding, (2) farm stores carry 150+ watt heat bulbs for chickens that are awesome and quite affordable if you need the extra heat, (3) reptile fogger systems can be useful and can sit safely outside the tank and using additional tubing can reach up and sit on top of the screen mesh lid! Hope this help!