I have an Ebo & a cheaper Ebo imitated heater. Both drift with the Ebo being the better of the two. They can be on at 79.5 or off at 78.5. Go figured that. Otherwise they keep it within a couple degree,s. I have never had an Ebo fail myself.
Since adding my RK2, and running the heaters through the controller, my temp varies less than .5 and has a high end shutdown of 79
I few years ago, I used the Ranco controller and it also worked great, except you had to dip the probes. Not sure how they are now.
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Doug
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