I have a 10 gallon tank with the screen top covered mostly with glass to keep heat and humidity in and I'm using a Reptile Basics heat pad on a hydro farm thermostat with a 50 watt red bulb for the ambient. It did not smell really all I smelled was his feces. When I had a boa long ago his regurge smelled up the whole area around his enclosure and it was awful. I fed F/t heated in hot water for about a hour. Now that I think of it the mouse smelt kind of funky and was a frozen mouse from Petco. Add soon as I cut open the bag I got a wiff of something stronger then usual. Weird because I bought the past two mice the same day as this one