Quote Originally Posted by Spike4179 View Post
Yes my UTH is regulated by a thermostat and I'm measuring the temperatures with a temp gun. I also have cypress mulch just as a back up if my humidity gets too low ,but it's been super humid these past couple of weeks where I live so that's why I got aspen. Thanks for the help and quick responses.
Awesome! Sounds like you're off to a great start.

Are you measuring the substrate or the actual surface temp?