We have a bleaching system on our home for the removal of sulfur odor. We have currently run into the problem of having to run bleach through this system at least once a week to remove the odors. A week later it is back. We have replaced the anode rod in the hot water heater, we have taken the anode rod out completely, nothing of which is working. How do you remove the sulfur odor and make it STAY AWAY! Any suggestions?