I have the probe inside the tank under the substrate. And I have the foil treatment done. The temps have always been good but I wanted to go ahead and insulate the sides and stuff so I can be prepared for the winter.

How much of a difference did you see in temps when you insulated. Like how much extra heat do you think this will actually keep inside? I've done it already (went to Wal-Mart asap) so I'm going to monitor and see, but I was just curious how much of a difference it can make