Okay, I see what you're saying. It looks like a thermostat would be much better and more convenient. I'm not sure if I have a piece of glass ... Is there any alternatives? I thought I read somewhere that tile works? Also as far as the thermostat, what would you suggest for me? It will be for 1 ball python inside a plastic tub, so I don't need anything fancy. I just want something cost effective that will get the job done. Also, whats up with the Acurite thermometer/hydrometer? Is it any good? I saw a $9 analog version, would that work or would it be better to get a digital version? Basically I'm just trying to get the most cost effective setup that I can. I have a limited budget and I just want to get what is absolutely necessary for now.