I am getting a new girl on thursday, my tank is set up, but because she is so small i am starting her off in a 20 gal. tank. I have a zoomed uth with a thermostat. my problem is i can't get the hot side above 80 degrees. I am using only 3/4 - 1 inch of cypress mulch. here are the temps i get. The temp under the hide onthe cypress is 80. the temps on the glass under aspin is 95. the temp on bottom of tank right on bottom on mat is 109. the thermostat is set at 105. the tank is on an open stand that fits the tank. Ambient tempsare 70, but i am getting a foam wall for the 3 side, to help with the ambient. Humidity is 40-45%. Is there a problem with the uth or are these temps normal. The uth is for a 10-20 gal tank size. Temp probe is on glass inside tank, under cypress. Can anyone help, is the uth bad or the thermostat.e.