Flexwatt v/s UTH

Does Flexwatt and UTH not melt plastic tubs or give off some warm plastic fumes? Am i not getting it? where does the flexwatt go on a rack? shouldn't it be strips under each tub?

i just saw the post about using the plastic racks that come with 2 or 3 drawers already together. i have seen so many that i believe i could alter but i am concerned about heat.

does each tub need to be hooked to an individual thermometer and thermostat? that seems right but you would have one of every supply for each snake.

What are ya'lls thoughts?

yous hould keep it kept at the proper temp and it wont melt anything. no fumes either

and looka t some of the guids. each rack should be on its own sensor. thats all