Quote Originally Posted by catboulet View Post
So it's not a good idea to put it on the bottom of the uth? So it would be tank/uth/probe and adjust the temp so it reads 90f inside the tank on top of the glass?
You can but you will have to temp gun the glass and adjust your thermostat till you get temp gun readings where you want them.
You have to do this anyway but there will probably bee a bigger difference between the two readings.