on a personal note....

i use a fish tank heater and use the tank as a incubator and growing chamber....

the bottom of the chamber are the newly innoculated jars...then water and h202 are added...the heater is placed inth water (do some experiements to find what setting keeps the water around 86 degrees consistantly)
on top of those jars the cakes are placed on a screen. withthe water temp around 86 and the tank covered...the humidity is 88-94% and air temp around 84-86 degrees.

it kills two birds with one stone.

-Ar393

You trying hard to kill yourself or what? This sounds like telling someone to get in a bath tub full of water and proceed to use a hair dryer! Good way to electrocute yourself! The pad should be under the container, not in it! Granted they make the heating pads for wet/dry use, but you wanna trust some chinese guy who got paid 35 cents a day to make 5000 heating pads? I wouldn't! If you insist on putting something electric into water it better be an aquarium heater, they are made to be used that way, heating pads are definately not!

think before you open your mouth and you won't have to worry about your problem with looking foolish.