So I have a simple rack system with 4 snakes in 28 quart tubs, separately of course. I run 3 inch flex watt on the back bottom controlled with a zilla 500 watt thermostat set at 92°. I test the temps weekly with my temp gun and I have a secondary electric thermometer always on. My question is, how do you actually test the surface temps inside the tub when it's pushed closed? I mean, it's not like I can fit my arm back there.
Thanks in advance