Deb, I am not really rolling in cash right now, is there a cheap (but effective) way to get a T-stat? I have been seeing people saying that rheostats work? Where do you get them?
Until you have the necessary funds for a reliable T-Stat, you can use a lamp dimmer like this one http://www.lowes.com/lowes/lkn?actio...-WH&lpage=none which will cost you about $10.

Note: I would rather use this kind of dimmer than a ZooMed Rehostat