I have a well, and sometimes the particles clog the water softener, so the water heater gets it as well, if I don't catch it right away.
I have noticed that the efficiency of the water heater is down, and suspect that the heating rod is coated. The water heater is 6 years old.
Have read that you can pour KLR or some other lime/rust remover in the water heater and that can help dissolve the coating on the rod. Does this work, and is it safe?