hey guys I currently have a fairly young June 08 female that I bought in August, and I have been using a UTH for some time now without a rheostat or tstat only because I did not know about this option! music to my ears as a broke college student!!!! but anywho... I have a 20L tank setup with 2 layers of paper towel under astro-turf...I have placed my thermometer probe directly above the UTH but inside the glass and hooked up the dimmer.. the thermometer immediately read 120 degrees but the surface of the astro-turf was just warm, maybe between 80-90 degrees.

So here is my question, after that rambling...
what temp should I be trying to maintain with this subtrate? I have it pretty consistent at 115 degrees, too hot? I noticed that if I allow it to drop to around 110 degrees my warm side temp will drop a bit under 90degrees.

Thanks for any help!