I have been living in this house over 20 years. Just in the last year water started smelling like sulfur. Found the source to be water heater, replaced. Read about bleaching system. Did the bleaching and it is better but still there. Is the correct course of action is to re bleach until it is gone from the system? If I run the outside faucet (source from before water softener but after storage tank) water is perfect, no smell and taste great. Any advice would be greatly appreciated.