First of all get to wal mart and get an acurite indoor/outdoor thermometer that also measures humidity. It costs about $12. Here's a picture.


Then get over to exotic pets Las Vegas. It's on decatur and lake mead. I have been there and another member (Brainman1000) also goes there. They have inexpensive UTH's that you can use as a replacement for the heating pad you are now using and also buy a thermostat. I've found that depending on where I have my water dish the humidity changes slightly, but you're never gonna know for sure if you're humidity is correct unless you have something measuring it. Check out this link on setting up a glass tank setup also, it may help a little. Good luck with your setup.