Quote Originally Posted by Bogertophis View Post
That's exactly right- that too much substrate over the UTH prevents the warmth from rising (plus it can make the UTH fail if it overheats as a result).

Also, UTH are not meant to be used vertically- first, it's not efficient- heat rises up & out- but also may cause it to fail?
Literally on the package its written that it can be put vertically. And I know its not really efficient but i'm trying to heat it the most I can so I think its better for it to be there than not !

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