Thanks for the replies. Tank is a 20 gallon with a heat lamp and hide box on the cool side, newspaper substrate, and water bowl, obviously. I have not put in a hide box for the warm side because he just slithers his way under the newspaper when he wants to get warmer. The temperatures aren't warm enough (80ish on warm side) so I got the UTH. Next on the list is the thermometer, which I have to get still. So I need to get something to regulate it? I was led to believe that the UTH's were superior to a heat rock in that they don't get too hot, maybe 100 degrees. Sounds like a classic case of a petstore trying to sell a product.