Ok thanks. I think I'll just get some heat tape then bc I was planning on getting it eventually anyways, the only reason i used the pads was just bc i already had them...The room i have them in usually stays at like 74-76 so Im not super worried about the cool side temps. I think I'll also take your advice and hot glue the probe on the inside of the tub over the hotspot. One more question: Is it ok to just stick with the one probe in the one tub and base all my temps off of that? Like is there any way to add more probes?