How come my vision rack has almost every tub at perfect temps. But two of the tubs (that are side by side next to the perfect temps) do not have perfect temps. I have a temp gun and the perfect temps are 89-93 on the hot spot and 77-82 on the cool side. But on the other tubs it is 85-87 cool side and 97-102 on the hot side. This is with the same tubs, same substrate (aspen), same heat cable, same thermostat. The tubs in question on the second and third from the bottom. The perfect ones are also second and third from the bottom. Kinda puzzling? I do see the snake stay on the high hot spot sometimes, so could it be that the temp gun is picking up some other temp? Any info will help. P.S. I did tape the probe next to the heat cable.


