Zilla Heat Mats Reptile Terrarium Heater
Have used this brand and heat mat for all my reptiles in 20 gallon tanks and 42 qt tubs for the past three years. They have never malfunctioned or caused damage. I recommend using aluminum foil tape to hold them more securely they dont stick too well.
After about one week the sticky came off the back and fell off of the aquarium. I have raised reptiles for years and have NEVER had this happen. Waste of money!
My heater came with a bubble in it, didn't have time to send back so I used as is. But I'm pretty sure it shouldn't have had the bubble, but brings my old heater went out and it worked i went with it. Would not but again tho because of it