I use a baking soda solution. I mix a small box of baking soda in a 1 gallon water jug and let it dissolve completely and then pour into the tank with about another 5 gallons of water. Drive around a little bit and run the water from the fresh tank through all faucets, toilets, and drains.
Then fill tank with fresh water and do the same with the driving and faucets.
Ron
Ron & Sandie
2013 Tiffin Phaeton 42LH Cummins ISL 400hp
Toad: 2011 GMC Terrain SLT2
Tow Bar: Sterling AT
Toad Brakes: Unified by U.S. Gear
TPMS: Pressure Pro
Member of: GS, FMCA, Allegro
RETIRED!! How sweet it is....