Yes, it goes low. I've added marks on the controller to get me in the ball park then it's just a mater of dialing it in. I start by filling it with tap water a little above the required temperature and by the time the fill is complete it is just about right. Ambient temp makes a difference, if it's winter and the house is cooler my thermostat setting is usually a little higher than my mark. It isn't a walk away type setup though; if you walk away for a half hour you may find your temperature has change by several degrees. I Initially check every 5 minutes or so and make fine adjustments to the controller as necessary. After a few cycles of checking and adjusting it will hold the temperature for the entire development process.

Quote Originally Posted by bobwysiwyg View Post
So the low setting (presumably) holds the temp low enough for the color chemicals? I tested our slow cooker, a different make, and the lowest, stabilized temperature was around 120F.