Title: Not Sure
Product review: This shipped in excellent condition from what I could tell, but after installing it I'm not even sure if it's working or not. I put this on the bottom of a 20 gal tank (the rubber feet they included to elevate your tank are great btw), and before lowering it back to position after 15 mins I put my hand on it and felt nothing, no heat. Maybe it just takes awhile to warm up, so I may update this review (and give a higher rating) if this turns out to be true. Otherwise, it was simple and easy to install!
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