I use a layer of PAPER TOWEL covered by aspen shavings in my tank. in the hide with the UTH beneath, I move most of the aspen out of the way leaving a very thin layer(basically just scattered) this leaves the paper towel exposed and I set my Thermostat to 93 and my probe reads around 91-92 depending on the time of day.
Hope I helped!
where is your probe located? under the paper towel or on top of the substrate or on top of the paper towel under the substrate?
Racing... because baseball, basketball, football and soccer only use one ball.