Originally Posted by nevohraalnavnoj
All racks do this, it's a combination of several things. First, heat rises so higher tubs tend to be warmer. Second, the tubs above a tub help insulate it. So in most racks, the second from the top tub is the hottest. Third, depending on how the flexwatt is run, some have belly heat and partial side heat (sort of a zig-zag running up each side).
Above all, don't worry! Your snakes are more robust than you might think. If you have a several degree sway between various tubs, try and set all temps in the center of your ideal range so that the highs and lows balance out. For example, I shoot for about 90-92 degrees on the hot spot. I shoot for 80-82 on the cool side. After all was said and done, I have some that are 82-84 on the cool side, some that are 79-82. My hot spots in each tub vary from 93 to 90 degrees.
Sounds like you're doing everything right, so don't sweat it!
JonV
I agree there is always gonna be variation which depends on location of tub like mentioned and the type of heating element. Flexxwats can vary slightly from one to another. I have racks with flexwatt(Freedom breeders) and other with heat rope(Animal plastics and Vision) and they seem to be a bit more even because they are one continual heat source. As long as the temps arent way off you should be OK.
How are you measuring temps? I noticed the location of probes of off an inch can change temp readings significantly
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