Is the Repti-Med under tank pads the best way to heat under a 40 qt tub?

Do I need to of them for each Tub for the Cold & Hot side?

Do I need rheostat temp guages w/dial for each one of them also?

Thanks I am soldering airholes as we speak!


p.s. (i bought 4 digital hygromters just in case)

p.s.s. (and got more 2 baby bps for only $29 at petco tonite!) $50 off what a deal!