You're welcome Robin. I knew there was a reason I took a picture of that. Also, not sure if it matters but I have my probes just above the substrate (soil about an inch deep). I have the one probe from the temp/hum gauge on the hot side with the unit itself on the wall of the cool side. The second probe is from another temp guage that I use to show the temp in my livingroom. I just ran the probe line under the soil along the edge of the tank and placed it just above the substrate in the center front of the tank. Probably gonna move it to the center back during the next cleaning though.