tell me more Bigsby. In fact I have been leaving the thermometer in that spot and I have been fighting with temps for the last few days nearly none stop. What rules should I follow? I assume root zone water temps are what I need to be measuring here and not the actual water in the res. Thus the remote probe is simply buried at the bottom of the hydroton. Other then water temp I need to get canopy temps so how best to place that thermometer?