Think about this. When was the last time you sanitized you water lines and water heater tank at your house? Not saying you don't need to sanitize,just that it might be overdone a little. If you ever seen the stuff that comes out of a fire hydrant you might not drink or bath in it. What might grow in you tank is nothing compared to what is in your house water system. Yes, you need to clean your tank and lines when you first get your RV, after that your RV system is a lot cleaner than a lot of city water systems.
