Water heater anode rod replacement, teflon tape or no?
I just replaced my anode.  I wrapped three layers of teflon tape and torqued it to 66ft-lb which seemed adequately tight.  Online torque tables specified max 78ft-lb for 3/4 NPT.  Resistance between anode hex head and outlet was 0.6ohm.  This is essentially zero resistance. The lead to lead resistance alone is 0.2ohm.