It gets cold up here in northern mn 2 but i never considered insulating a tank. I only use glass tanks for rodents now tho. The reptiles are all in tub rack systems i built. I will say be very very carefull with that hydrofarm, I had those fry on me last year and they werent even a month old. One failed up and cooked the eggs in the incubator and the other failed and shut off. Would have prefered that. lol. Its a cool idea. Best of luck with it bud.