Zoo Med ReptiTherm Under Tank Heater, Medium

It is the best for my bearded dragon

Keeps my python’s warm hide between 88-91F. Great for my 40 gallon breeder. It also has a battery backup, so if the power flickers, it will remember your temperature setting. A MUST have for ball python owners.

Stays nice and hot, no issues there. Problem is the adhesive is not strong enough to keep it stuck on the bottom of the tank when the mat warps from heat about a year in. Dont have a lot of options so this may be as good as it gets... Note: for new reptile owners, you WILL need to buy a thermostat for this to control temperature, it gets hot! Up to 130F easily.