No, that's why you need to read the temps inside the tub also. I use a temp gun...well worth the money. But digital thermometers/hygrometers are good too (like this one http://www.amazon.com/Chaney-Instrum...9399659&sr=8-1) On my DIY rack with my tubs I have the thermostat set to 94 degrees, which keeps it steady inside the tub according to my temp gun at 90 degrees.
The degree that you set it at completely depends on what you use for substrate and where you live....
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