Baconlover - I usually store water in the fresh water tank as an earthquake preparedness measure, and I have no qualms over using it if it has sat for 3-4 months. I suspect there's also less risk of stuff growing if the tank is kept full, as well.
Otherwise, I maybe sanitize once a year. Maybe every other year.
Dave
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2000 2720SL & 2007 3124KB
2005 Toyota Sequoia
Twin Battle Born 12v 100Ah LiFePO4 (BBGC2) batteries, 300W solar on rear shell, Link 10, Lift kit, Maxxis 8008 225 75/R15 E tires
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