In locales with sulfides in the water, there is a reaction with magnesium anodes which creates hydrogen sulfide gas that produces a rotten smell in the water. Smelly water conditions typically occur in private wells located within locales of the country known for very hard water. In other locales with high conductivity water, aluminum anodes create an aluminum hydroxide gel that decreases the efficiency of the heater and quickly depletes the anode leaving the tank unprotected. Powered anodes, also known as impressed current anode systems, replace the function of a sacrificial anode by introducing electricity into the water heater via a titanium-clad electrode that protects the steel. Since no chemicals are added to the water as with sacrificial anodes, the Powered Anode System will not create smelly water or aluminum hydroxide. This next generation of anode provides consistent protection that extends the life of your water heater tank.