Ok, so I'm having an issue. I've been trying to get this cage built for a gtp. I'm having a big issue. Tank set up: I have 2 perches. The top one, near the light is where the probes are. I have tried under tank heater on back outside of the rubbermaid tote. I have 3" heat tape on outside back also. I have the 11" heat tape on bottom. I have not plugged all in at the same time. I'm trying one for 6 hours then another one, then another one. I've noticed a difference in readings. I have 2 digital thermometers with probes. I also have a temp gun. I'm getting 2 very different readings. The two digital thermometers are saying the temps are 75 ish humidity ranging feom 49 to 51%. The two are reading within 2 degrees from each other. The temp gun is saying the temps are 88 to 91. At the same spot. The thermostat probe was moved also to the same spot. It is saying the same thing, 75 ish. The 3 heating sources I've tried over the last 2 days do not seem to be doing anything as far as raising temperatures. At all. I tried 3" and 11" flexwatt and a small exo terra under tank heater. They all read over 95 degrees when I test them with the temp gun. However, I'm thinking that could be inaccurate even though I just got it yesterday. Am I making a rookie mistake? I am pretty sure that out of 3 of those the temps should have raised somewhat. All 3 failing together? Its unheard of. The only time the heat was raised is when I had an incandescent 60 watt bulb in instead of an led light.