Flexwatt and thermostat questions???

Okay here goes. I have an undertank heater for my Ball python, and it works fine but i have spent some time on these forums reading on flexwatts and thermostats. And i just wanted to know exactly what they are, how they work, are they worth investing in, and where i might get some fairly priced ones? Sorry for my excessive questions, i am an aspiring ball python hobbyist and i want my bp:snake: to be as happy and comfortable as snakely possible:)

May as well let an industry expert educate you. Go to this link and read up on the Flexwatt and Thermostat FAQ's. :)

http://www.reptilebasics.com/Heating-p-1-c-248.html

Great thank you. I have just one last question for now(sorry, again), can i use these with an aquarium set up? i do intend on getting tubs but not until later in time.