http://www.homedepot.com/webapp/wcs/...ctId=100001525
A rheostat/lamp dimmer would help adjust the heater.A thermostat is best,but dimmers work fine if you don't mind checking the temps often and adjusting as needed.I have my baby Hoggie in a 9qt tub with a UTH on a dimmer.It has aspen,and the smallest Exo Terra Cave and food dish for water.She spends most of her time tunneling around.