Review on Finnex Digital Temperature Controller Heater by Shawn Martin

Not sure if I have a lemon or something. The gauge I received may not have been properly calibrated as the temperature displayed is consistently higher than the actual water temperature. I found it ok and adjusted the temp higher to get my desired water temp. This has been working fine for a month but now the device says the water temp is 77F but the other two temps tell me the water is 83.5F. - I wish it showed up to tenths of a degree. - The alarm is annoying during water changes when the temperature you add to the tank is too high or too low for your alarm settings.