Quote Originally Posted by Kaorte View Post
you don't need much substrate. half an inch should be enough and it won't change the temp on the probe much. Just make sure the probe for the thermometer is measuring the temp right on the glass and don't let it get hotter than 95*F.
Ok well i put the probe under the UTH as u said in my other thread. Is it bad if the probe touches the UTH like directly?

Also with no substrate it shut off at 93.6 deg according to the acu rite. and turned back on at 90.3 deg

Does that sound about right? i will let it shut off and back on a few more times to make sure its all good