Quote Originally Posted by dr del View Post
Have you checked the thermometers side by side to make sure they read the same (not that I think that accounts for a ten degree difference)?
I have both Acu-Rites in the tank, across from each other. The one probe is under the newpaper & aspen, the other is above.

The inside temps (unit temps) are one degree apart so I have to assume that the probes are relatively close in accuracy. The temp gun had a similar reading.

Maybe my local newspaper is thicker than most. I'll make the change on the weekend and let you know.

Thanks.
JohnNJ