I just keep the tanks closed till they fill up and then flush them - have never had the need to flush them ever! I have recently switched to the Tank Techs - All natural Probiotic Tank Treatment, which is supposed to stop the buildup of mineralization that causes misreading sensors. More expensive than other treatments so I hope it was worth the money.
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Darren
2015 Thor Hurricane 34 J
Custom paint 2019 (Pro Custom Inc., Elkhart, IN)
2019 Honda Accord 2.0T Sport 6 speed manual
(THOR)