what are u using forsubstrate?... if the UTH is under the tank and u are u usin aspen of coconut husk fiber u caan control the ground temp by simple making the substrate thicker or thinner where the UTH hide.... and also u should have atleast to hides for the snake to be happy ... a warm hide and a cooler one , so he/she doesnt has to choose between temp n security ... currently i have mine set up so that its half under the hot hide and half under the area where the water dish sits so it stays a lil warm to.