Can I attatch my ZooMed Heat pad directly to tub?

[kitedemon]

I guess they should lay their cage out better then.

I bet if I take a heat pad, place it under a tank, plug it directly into the wall, place repti carpet and then a piece of slate over it(rock)...I'll bet the rock and area around it will be lucky to hit 100 degrees.

The OP is NOT speaking of a tank. A plastic tub has next to no insulative value. There is likely to be little loss of heat to the tub so you are relying on just the (MOVABLE) substrate to protect the OPs snake. That is irresponsible. I might concede that a UTH on a tank with carpet and rocks might not exceed 100ºs but that is NOT what was described. You do understand that Royals cannot digest food if their core temp is to high or too low right? The OP does not have regulated rooms or over head heat just a single snake and a plastic tub. Even if you don't need a t-stat (I disagree but...) he/she does.

Thermal burns are the NUMBER ONE injury for captive reptiles. Thermostats are the primary defence against this occurring. Cycling a resistive heater should do less harm that running it 100% 24/7.