Thanks everyone! Yes, I do want to switch over to a Herpstat for sure. I just can't figure out why all of a sudden two different TStats failed on the same rack. My TStat is saying the temp is at 89 degrees but the tape itself is 130 and around 120 in the tubs . I will check the connections as well. This all started when I moved recently which is why I am suspecting something wrong with the tape. At least all the snakes were smart enough to move to the front!!