New t-stat, where to put the probe?

[snakesRkewl]

Or you could tape the flexwatt/heat pad to the shelf your tub sits on, no need to put the heat pad on the tub at all.
I'm not saying it's wrong, BUT, there is no need for feet on the tub?

I would never attach the heat pad to the tub, I like to grab the snake, throw it into another tub, grab the tub and spray it down wipe it out, sometimes even hose them out.