Quote Originally Posted by PitOnTheProwl View Post
Stick on the glass SUCKS, they are not accurate at all....................Your best bet is to go to Walmart or HomeDepot and get a indoor/outdoor digital Accurite

Robert is absolutely right. Those stick-on's are worthless, the Accurite is a far better product. I'd also recommend an infrared temp gun as well. For $30.00 you can get an accurate temp gauge that will tell you the temperature in every part of the tank.