I put this in the debatable section because there is a tfo moderator and other members that seem to have a problem with me suggesting or doing my own electrical wiring. I took an old crock and taped some self regulating heat tape around the outside of it with a tape used for pvc, I then insulated the outside with armaflex insulation which is usually used in cold applications but also works with heat tape in a cooler environment. I then applied some water protection to the exposed areas with some lite weight aluminum tape and sheeting. This will hopefully let me keep some of the tortoises outside longer this fall, and if we get some nice weather this winter. I have a few more of the crocks that I picked up this summer to setup.