they are all off by 100, 1, and 10 respectfully; so we can say it was deliberate for whatever their reasoning may be.
Steel tanks, that’s why the sacrificial anode is there so the water eats it away instead of the tank.
The sacrificial anode is there to protect the steel tank. It lasts a long time. This is a hard water problem as everyone else is saying, and a water softener would solve the issue.
*Edit: check the very bottom of your tank since you have the elements out. It most likely has a pile of calcium and other minerals sitting on the bottom.
-a plumber
ooo that sounds so good, it would go great with my homemade rdx bread