Some people have used Hydrogen Peroxide instead of bleach.
I sanitized my fresh water back when I first purchased the coach in 12/2003. It hasn't been sanitized ever again as it gets used frequently enough to not worry about it.
Although I just remembered that on our trip to Alaska in 2012 I took on some bad shore water at the Riverview RV Park in North Pole Alaska so I had to clean my tank and water softener right after that happened. Too much iron in the water. Basically it looked like rusty water.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
We are at our Winter Home in Flagler Beach FL