I installed a new well in October the water is hard, has iron and sulfer. In November I had a water softner installed along with a col sorb system (potasium permag)everthing is working well on the cold water side, but I continue to get the sulfer smell on the hot water side. The water heater is electric and is eight years old. I had the anode rod replaced in November and they also cleaned and flushed the tank with bleach. It was ok for one week an the smell returned. I continue to add bleach in the water softener and after a week the sulfer smell returns again. The softener regens every 330 gallons and the col sorb regens every three days. Could the hot water heater have bacteria biuld that is unable to clean out? Should I install a new hot water heater? I am open for any other plan you may have.